diff --git a/ext/ComradePyehtimExt.jl b/ext/ComradePyehtimExt.jl
index e357ddf1..b3064968 100644
--- a/ext/ComradePyehtimExt.jl
+++ b/ext/ComradePyehtimExt.jl
@@ -14,8 +14,8 @@ function build_arrayconfig(obs)
     source = get_source(obsc)
     bw = get_bw(obsc)
     angles = get_fr_angles(obsc)
-    tarr = Pyehtim.get_arraytable(obsc)
-    scans = get_scantable(obsc)
+    tarr = StructArray(Pyehtim.get_arraytable(obsc))
+    scans = StructArray(get_scantable(obsc))
     bw  = get_bw(obsc)
     elevation = StructArray(angles[1])
     parallactic  = StructArray(angles[2])
@@ -140,7 +140,6 @@ Returns an EHTObservationTable with visibility amplitude data
 """
 function Comrade.extract_amp(obsc; pol=:I, debias=false, kwargs...)
     obs = obsc.copy()
-    obs.add_scans()
     obs.reorder_tarr_snr()
     obs.add_amp(;debias, kwargs...)
     config = build_arrayconfig(obs)
@@ -163,7 +162,6 @@ Returns an EHTObservationTable with complex visibility data
 """
 function Comrade.extract_vis(obsc; pol=:I, kwargs...)
     obs = obsc.copy()
-    obs.add_scans()
     obs.reorder_tarr_snr()
     config = build_arrayconfig(obs)
     vis, viserr = getvisfield(obs)
@@ -181,7 +179,6 @@ Returns an EHTObservationTable with coherency matrices
 """
 function Comrade.extract_coherency(obsc; kwargs...)
     obs = obsc.copy()
-    obs.add_scans()
     obs.reorder_tarr_snr()
     config = build_arrayconfig(obs)
     vis, viserr = getcoherency(obs)