diff --git a/README.md b/README.md
index 14e5faf..6cbfc20 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,6 @@
 # MWA Demo
 
-This is demonstation of a simple data processing pipeline for Murchison Widefield Array (MWA) data,
-from downloading raw data to creating an image.
+Demonstration pipeline for Murchison Widefield Array (MWA) data
 
 ## Flow
 
@@ -103,7 +102,7 @@ running Docker withing WSL. It may be necessary to change
 
 ## Setup
 
-Clone this repository to a macine that meets the [system requirements](#system-requirements).
+Clone this repository to a machine that meets the [system requirements](#system-requirements).
 
 ```bash
 git clone https://github.com/MWATelescope/mwa-demo.git
@@ -152,7 +151,7 @@ The demo has been tested on Windows 11 with Docker Desktop 4.33.1 on a Git Bash
 For optimal performance, you should compile the following software dependencies directly on your
 machine.
 
-Advanced users can provide additional compiler flags during the build process to optimize for their specific CPU microarchitecture. e.g. `-march=native` for C/C++, or `-C target-cpu=native` for Rust.
+Advanced users can provide additional compiler flags during the build process to optimize for their specific CPU micro-architecture. e.g. `-march=native` for C/C++, or `-C target-cpu=native` for Rust.
 
 The steps in the `Dockerfile` may be a useful guide.
 
@@ -194,19 +193,39 @@ Linux users should also ensure they have permissions to run docker without root:
 quick start: pull the images from dockerhub.
 
 ```bash
-docker pull d3vnull0/mwa-demo:latest
+docker pull mwatelescope/mwa-demo:latest
+```
+
+When [running the demo](#running-the-demo), you should run the commands in an interactive Docker shell.
+
+```bash
+docker run -it --rm -v ${PWD}:${PWD} -w ${PWD} -e MWA_ASVO_API_KEY=$MWA_ASVO_API_KEY mwatelescope/mwa-demo:latest
 ```
 
 #### Docker Troubleshooting
 
+macOS users: if you see this error: `WARNING: The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested`, you should pull the image for the correct platform.
+
+```bash
+docker pull --platform linux/arm64 mwatelescope/mwa-demo:latest
+```
+
 If you have any issues, you should delete all traces of the image that was pulled and build the image locally. (this may take a while)
 
 ```bash
 # first remove the image that was pulled from dockerhub
-docker rmi d3vnull0/mwa-demo:latest
+docker rmi mwatelescope/mwa-demo:latest
 docker builder prune --all
 docker buildx prune --all
-docker build -t d3vnull0/mwa-demo:latest -f Dockerfile .
+docker build -t mwatelescope/mwa-demo:latest -f Dockerfile .
+```
+
+### Hybrid
+
+If you have some software dependencies installed locally, you can use Docker to run the rest. Just comment out the packages you don't need in `demo/00_software.sh` and source it in your shell.
+
+```bash
+source demo/00_software.sh
 ```
 
 ## ASVO account
@@ -244,16 +263,17 @@ docker images.
 
 ### Running the demo
 
-Below is a walkthrough of the demo. Ensure everything is run from the root of the repository
-(don't `cd` into the `demo` directory).
+Below is a walkthrough of the demo. Ensure that:
+
+- (if using [Docker](#docker)) you are in a Docker shell, not your host system.
+- (if [hybrid](#hybrid)), you have sourced `demo/00_software.sh` in your host shell.
+- everything is run from the root of the repository
+  (don't `cd` into the `demo` directory).
+- you don't `source` the scripts, they are `chmod +x` and should be run directly.
 
 ```bash
-# DEMO: open a bash shell
-# DEMO: change directory into the root of this repository.
-# set up the software environment to use Docker for any binaries not on your system
-source demo/00_software.sh
-# check that everything is working (and pull Docker images)
-demo/00_test.sh
+# check that everything is working
+demo/00_test.sh # don't source me!
 # query the MWA TAP server with ADQL using the pyvo library
 clear; demo/01_tap.sh
 # display giant-squid commands to download observations
@@ -285,8 +305,8 @@ export obsid=1341914000
 export metafits=${outdir}/${obsid}/raw/${obsid}.metafits
 export prep_uvfits="${outdir}/${obsid}/prep/birli_${obsid}.uvfits"
 export cal_ms="${outdir}/${obsid}/cal/hyp_cal_${obsid}.ms"
-eval $python ${SCRIPT_BASE}/04_ssins.py $prep_uvfits
-eval $python ${SCRIPT_BASE}/04_ssins.py $cal_ms
+python ${SCRIPT_BASE}/04_ssins.py $prep_uvfits
+python ${SCRIPT_BASE}/04_ssins.py $cal_ms
 
 # combine them all into a single image
 obsid="combined" cal_ms=$(ls -1d ${outdir}/*/cal/hyp_cal_*.ms ) demo/07_img.sh
@@ -304,16 +324,16 @@ multiple platforms using `docker buildx`.
 
 ```bash
 # quick start: pull the images from dockerhub.
-docker pull d3vnull0/mwa-demo:latest # on macos or linux arm64 (Apple M series), add --platform linux/arm64
+docker pull mwatelescope/mwa-demo:latest # on macos or linux arm64 (Apple M series), add --platform linux/arm64
 
 # if you have any issues, you can override the image with a fresh build on your local machine
-# docker rmi d3vnull0/mwa-demo:latest
-docker build -t d3vnull0/mwa-demo:latest -f Dockerfile .
+# docker rmi mwatelescope/mwa-demo:latest
+docker build -t mwatelescope/mwa-demo:latest -f Dockerfile .
 
 # If you still encounter issues on macOS arm64 (Apple Silicon, M series),
 # the same image is also available via Docker x86_64 emulation. Make sure to update
 # your Docker Desktop to the latest version, as this features is relatively new.
-docker pull --platform linux/amd64 d3vnull0/mwa-demo:latest
+docker pull --platform linux/amd64 mwatelescope/mwa-demo:latest
 ```
 
 Here's how to customize and build the image for multiple platforms and push to dockerhub
@@ -348,5 +368,11 @@ docker buildx build \
   --push \
   .
 
-# DEV: docker buildx build --platform linux/amd64,linux/arm64 -t d3vnull0/mwa-demo:latest -f Dockerfile --push .
+# DEV: docker buildx build --platform linux/amd64,linux/arm64 -t mwatelescope/mwa-demo:latest -f Dockerfile --push .
+```
+
+If you add extra raw files, you can add their checksums with
+
+```bash
+md5sum demo/data/*/raw/1*fits | tee demo_data.md5sum
 ```
diff --git a/demo/00_software.sh b/demo/00_software.sh
index 5a45769..14d20b7 100644
--- a/demo/00_software.sh
+++ b/demo/00_software.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 export docker_base="docker run --rm -it"
-export docker_img=${docker_img:="d3vnull0/mwa-demo:latest"}
+export docker_img=${docker_img:="mwatelescope/mwa-demo:latest"}
 
 # silly hacks for Windows / Git Bash
 if [[ -n "$OS" && "$OS" == "Windows_NT" ]]; then
diff --git a/demo/00_test.sh b/demo/00_test.sh
index 311471d..0c75a36 100755
--- a/demo/00_test.sh
+++ b/demo/00_test.sh
@@ -1,11 +1,19 @@
 #!/bin/bash
 # test the software dependencies via environment variables
 
+# is this script being sourced? https://stackoverflow.com/a/28776166/565019
+if (
+    [[ -n $ZSH_VERSION && $ZSH_EVAL_CONTEXT =~ :file$ ]] ||
+        [[ -n $BASH_VERSION ]] && (return 0 2>/dev/null)
+); then
+    echo "this script is not intended for sourcing, run it with 'bash demo/00_test.sh'"
+    return 1
+fi
+
 # ### #
 # ENV #
 # ### #
 # see: 00_env.sh
-
 if [ -n "$ZSH_VERSION" ]; then ME="${0:A}"; else ME=$(realpath ${BASH_SOURCE:0}); fi
 export SCRIPT_BASE=${SCRIPT_BASE:-$(dirname $ME)}
 source $SCRIPT_BASE/00_env.sh
@@ -17,35 +25,47 @@ source $SCRIPT_BASE/00_env.sh
 # we do this after the giant-squid check to avoid showing the api key in the logs
 set -eu
 
+# #### #
+# DATA #
+# #### #
+# DEMO: check raw files are present
+if command -v md5sum &>/dev/null; then
+    echo "validating raw files with md5sum"
+    md5sum -c demo_data.md5sum
+else
+    echo "md5sum or md5 not found. couldn't validate raw files."
+    exit 1
+fi
+
 # #### #
 # BINS #
 # #### #
 # DEMO: check software is installed
-if ! eval $giant_squid --version; then
+if ! giant-squid --version; then
     echo "giant-squid not found. https://github.com/MWATelescope/giant-squid?tab=readme-ov-file#installation "
-    return 1
+    exit 1
 fi
-if ! eval $wsclean --version; then
+if ! wsclean --version; then
     echo "wsclean not found. https://wsclean.readthedocs.io/en/latest/installation.html "
-    return 1
+    exit 1
 fi
-if ! eval $hyperdrive --version; then
+if ! hyperdrive --version; then
     echo "hyperdrive not found. https://mwatelescope.github.io/mwa_hyperdrive/installation/intro.html "
-    return 1
+    exit 1
 fi
-if ! eval $jq --version; then
+if ! jq --version; then
     echo "jq not found. https://jqlang.github.io/jq/download/ "
-    return 1
+    exit 1
 fi
-if ! eval $python --version; then
+if ! python --version; then
     echo "python not found. https://www.python.org/downloads/ "
-    return 1
+    exit 1
 fi
 
 ## ensure outdir exists
 if [[ ! -d "$outdir" ]]; then
     echo "outdir=$outdir does not exist. try mkdir -p $outdir"
-    return 1
+    exit 1
 fi
 
 # ####### #
@@ -57,7 +77,7 @@ if [[ $srclist =~ srclist_puma && ! -f "$srclist" ]]; then
     curl -L -o $srclist "https://github.com/JLBLine/srclists/raw/master/${srclist##*/}"
 fi
 # DEMO: verify srclist
-eval $hyperdrive srclist-verify $srclist
+hyperdrive srclist-verify $srclist
 
 # #### #
 # BEAM #
@@ -68,7 +88,7 @@ if [[ ! -f "$MWA_BEAM_FILE" ]]; then
     curl -L -o $MWA_BEAM_FILE "http://ws.mwatelescope.org/static/${MWA_BEAM_FILE##*/}"
 fi
 # DEMO: verify beam
-eval $hyperdrive beam fee --output /dev/null
+hyperdrive beam fee --output /dev/null
 
 # ######## #
 # OPTIONAL #
@@ -77,10 +97,10 @@ echo "recommended software, not on the critical path:"
 set +eux
 
 ## verify ASVO API Key
-eval $giant_squid list >/dev/null
+giant-squid list >/dev/null
 
 # DEMO: check wsclean features
-eval $wsclean --version | tee .wsclean_version
+wsclean --version | tee .wsclean_version
 while IFS='|' read -r feature details; do
     if ! grep -q "${feature} is available" .wsclean_version; then
         echo "warning: wsclean $feature not found. recompile wsclean after installing $feature"
@@ -93,14 +113,14 @@ EoF
 rm .wsclean_version
 
 # DEMO: check python version
-if ! eval $python -c $'"assert __import__(\'sys\').version_info>=(3,8)"' >/dev/null; then
+if ! python -c $'"assert __import__(\'sys\').version_info>=(3,8)"' >/dev/null; then
     echo "warning: python version 3.8+ not found https://www.python.org/downloads/ "
-    eval $python --version
+    python --version
 fi
 
 # DEMO: check python packages
 while IFS='|' read -r package details; do
-    if ! eval $python -m pip show $package >/dev/null; then
+    if ! eval "$python -m pip show $package >/dev/null"; then
         echo "recommended: python package $package not found."
         echo details: $details
     fi
@@ -112,7 +132,7 @@ mwa_qa|  git clone https://github.com/d3v-null/mwa_qa.git ; pip install mwa_qa
 EoF
 
 # DEMO: is the MWA TAP server accessible?
-if ! eval $python -c $'"assert len(__import__(\'pyvo\').dal.TAPService(\'http://vo.mwatelescope.org/mwa_asvo/tap\').tables)"'; then
+if ! python -c $'"assert len(__import__(\'pyvo\').dal.TAPService(\'http://vo.mwatelescope.org/mwa_asvo/tap\').tables)"'; then
     echo "warning: MWA TAP inaccessible. https://wiki.mwatelescope.org/display/MP/MWA+TAP+Service "
 fi
 
diff --git a/demo/01_tap.sh b/demo/01_tap.sh
index efeadea..bc6ce41 100755
--- a/demo/01_tap.sh
+++ b/demo/01_tap.sh
@@ -17,4 +17,4 @@ export details_csv=${details_csv:-"${outdir}/details.csv"}
 # ### #
 # query the MWA TAP server with ADQL using the pyvo library
 # details: https://mwatelescope.atlassian.net/wiki/spaces/MP/pages/24970532/MWA+ASVO+VO+Services
-eval $python $SCRIPT_BASE/01_tap.py $obsids_csv $details_csv
+python $SCRIPT_BASE/01_tap.py $obsids_csv $details_csv
diff --git a/demo/02_download.sh b/demo/02_download.sh
index 877b82b..824a8a2 100755
--- a/demo/02_download.sh
+++ b/demo/02_download.sh
@@ -31,19 +31,19 @@ fi
 
 echo "you should run one of the following commands manually:"
 echo " -> request raw visibilities"
-echo $giant_squid submit-vis $obsids_csv
+echo "giant_squid submit-vis $obsids_csv"
 echo " -> (or) submit preprocessed visibility conversion jobs (uvfits or ms)"
-echo $giant_squid submit-conv $obsids_csv -p output=uvfits,avg_freq_res=40,avg_time_res=2,flag_edge_width=80
+echo "giant_squid submit-conv $obsids_csv -p output=uvfits,avg_freq_res=40,avg_time_res=2,flag_edge_width=80"
 
 echo " -> get human-readable list of jobs that are queued or processing"
-echo $giant_squid list $obsids_csv
+echo "giant_squid list $obsids_csv"
 
 echo " -> (advanced) get a machine readable list of jobs that are queued or processing"
-echo $giant_squid list $obsids_csv --states queued,processing --json >$outdir/jobs.json
-echo $jq -r $'\'[.[]|.jobId]|join(" ")\'' $outdir/jobs.json
+echo "giant_squid list $obsids_csv --states queued,processing --json >$outdir/jobs.json"
+echo "jq -r '[.[]|.jobId]|join(" ")' $outdir/jobs.json"
 
 echo " -> wait until a job is ready"
-echo $giant_squid wait $obsids_csv
+echo "giant_squid wait $obsids_csv"
 
 echo " -> download a job"
-echo $giant_squid download jobid
+echo "giant_squid download jobid"
diff --git a/demo/03_mwalib.sh b/demo/03_mwalib.sh
index 8a5c050..572a0c6 100755
--- a/demo/03_mwalib.sh
+++ b/demo/03_mwalib.sh
@@ -33,7 +33,7 @@ if [[ ! -f "$metafits" ]]; then
 fi
 
 # get channel and antenna info
-eval $python ${SCRIPT_BASE}/03_mwalib.py $metafits
+python ${SCRIPT_BASE}/03_mwalib.py $metafits
 
 # DEMO: antenna info
 
diff --git a/demo/04_ssins.sh b/demo/04_ssins.sh
index be68efe..1d5938e 100755
--- a/demo/04_ssins.sh
+++ b/demo/04_ssins.sh
@@ -34,6 +34,6 @@ fi
 # DEMO: use SSINS (sky-subtracted incoherent noise spectra) to identify RFI
 # - top plots are baseline-averaged auto amplitudes, differenced in time
 # - bottom plots are z-score: (subtract mean of each frequency, divide by std dev)
-eval $python "${SCRIPT_BASE}/04_ssins.py" "$metafits" "$raw_glob"
+python "${SCRIPT_BASE}/04_ssins.py" "$metafits" $raw_glob
 
 # DEMO: SSINS can also be used to generate RFI flag files, but this out of scope
diff --git a/demo/05_prep.sh b/demo/05_prep.sh
index e15eabd..1c688af 100755
--- a/demo/05_prep.sh
+++ b/demo/05_prep.sh
@@ -46,7 +46,7 @@ export prepqa="${prep_uvfits%%.uvfits}_qa.json"
 
 set -eu
 if [[ ! -f $prep_uvfits ]]; then
-    eval $birli ${birli_args:-} \
+    birli ${birli_args:-} \
         -m "${metafits}" \
         $([[ -n "${edgewidth_khz:-}" ]] && echo "--flag-edge-width ${edgewidth_khz}") \
         $([[ -n "${freqres_khz:-}" ]] && echo "--avg-freq-res ${freqres_khz}") \
@@ -62,16 +62,16 @@ fi
 # details: https://github.com/d3v-null/mwa_qa (my fork of  https://github.com/Chuneeta/mwa_qa/ )
 
 if [[ ! -f "$prepqa" ]]; then
-    eval $run_prepqa $prep_uvfits $metafits --out $prepqa
+    run_prepvisqa.py $prep_uvfits $metafits --out $prepqa
 fi
 
 # DEMO: extract bad antennas from prepqa json with jq
 # - both of the provided observations pass QA, so no bad antennas are reported
-prep_bad_ants=$(eval $jq -r $'\'.BAD_ANTS|join(" ")\'' $prepqa)
+prep_bad_ants=$(jq -r $'.BAD_ANTS|join(" ")' $prepqa)
 
 # DEMO: plot the prep qa results
 # - RMS plot: RMS of all autocorrelation values for each antenna
 # - zscore:
-eval $plot_prepqa $prepqa --save --out ${prep_uvfits%%.uvfits}
+plot_prepvisqa.py $prepqa --save --out ${prep_uvfits%%.uvfits}
 
 echo $obsid $prep_bad_ants
diff --git a/demo/06_cal.sh b/demo/06_cal.sh
index 31912e9..f7148f5 100755
--- a/demo/06_cal.sh
+++ b/demo/06_cal.sh
@@ -59,7 +59,7 @@ fi
 set -eu
 
 if [[ ! -f "$hyp_soln" ]]; then
-    eval $hyperdrive di-calibrate ${dical_args:-} \
+    hyperdrive di-calibrate ${dical_args:-} \
         --data "$metafits" "$prep_uvfits" \
         --source-list "$srclist" \
         --outputs "$hyp_soln" \
@@ -68,7 +68,7 @@ fi
 
 # plot solutions file
 if [[ ! -f "${hyp_soln%%.fits}_phases.png" ]]; then
-    eval $hyperdrive solutions-plot \
+    hyperdrive solutions-plot \
         -m "$metafits" \
         --no-ref-tile \
         --max-amp 1.5 \
@@ -84,14 +84,14 @@ fi
 export calqa="${hyp_soln%%.fits}_qa.json"
 
 if [[ ! -f "$calqa" ]]; then
-    eval $run_calqa --pol X --out "$calqa" "$hyp_soln" "$metafits"
+    run_calqa.py --pol X --out "$calqa" "$hyp_soln" "$metafits"
 fi
 
 # plot the cal qa results
-eval $plot_calqa "$calqa" --save --out "${hyp_soln%%.fits}"
+plot_calqa.py "$calqa" --save --out "${hyp_soln%%.fits}"
 
 # extract bad antennas from calqa json with jq
-cal_bad_ants=$(eval $jq -r $'\'.BAD_ANTS|join(" ")\'' "$calqa")
+cal_bad_ants=$(jq -r $'.BAD_ANTS|join(" ")' "$calqa")
 export cal_bad_ants
 
 echo "deliberately disabling cal bad ants for the first round :)"
@@ -100,7 +100,7 @@ export cal_bad_ants=""
 # apply calibration solutions to preprocessed visibilities
 # details: https://mwatelescope.github.io/mwa_hyperdrive/user/solutions_apply/intro.html
 if [[ ! -d "$cal_ms" ]]; then
-    eval $hyperdrive apply ${apply_args:-} \
+    hyperdrive apply ${apply_args:-} \
         --data "$metafits" "$prep_uvfits" \
         --solutions "$hyp_soln" \
         --outputs "$cal_ms" \
diff --git a/demo/07_img.sh b/demo/07_img.sh
index b6c281c..f3db503 100755
--- a/demo/07_img.sh
+++ b/demo/07_img.sh
@@ -36,7 +36,7 @@ fi
 
 export imgname="${outdir}/${obsid}/img/wsclean_hyp_${obsid}"
 if [ ! -f "${imgname}-image.fits" ]; then
-    eval $wsclean \
+    wsclean \
         -name "${imgname}" \
         -size 2048 2048 \
         -scale 20asec \
diff --git a/demo_data.md5sum b/demo_data.md5sum
new file mode 100644
index 0000000..df3260f
--- /dev/null
+++ b/demo_data.md5sum
@@ -0,0 +1,2 @@
+ab0a3040c6adfc482ed1485fa080c18f  demo/data/1121334536/raw/1121334536_20150719094841_gpubox20_00.fits
+dabf81a21ab53a585e0afab67636fc9f  demo/data/1341914000/raw/1341914000_20220715095302_ch137_000.fits