diff --git a/src/ekobox/cli/inspect.py b/src/ekobox/cli/inspect.py
index f37f09cce..06f6588ed 100644
--- a/src/ekobox/cli/inspect.py
+++ b/src/ekobox/cli/inspect.py
@@ -27,7 +27,7 @@ def subcommand(ctx, path: pathlib.Path):
 @click.pass_obj
 def sub_mu2(operator: EKO):
     """Check operator's mu2grid."""
-    rich.print_json(data=operator.mu2grid.tolist())
+    rich.print_json(data=operator.mu2grid)
 
 
 @subcommand.command("cards")
diff --git a/src/ekobox/cli/run.py b/src/ekobox/cli/run.py
index 16e11c5fd..db88167e4 100644
--- a/src/ekobox/cli/run.py
+++ b/src/ekobox/cli/run.py
@@ -52,11 +52,11 @@ def subcommand(paths: Sequence[pathlib.Path]):
     else:
         output = operator.parent / OUTPUT
 
-    theory = yaml.safe_load(theory.read_text(encoding="utf-8"))
-    if "order" in theory:
-        theory = TheoryCard.from_dict(theory)
-    operator = yaml.safe_load(operator.read_text(encoding="utf-8"))
-    if "configs" in operator:
-        operator = OperatorCard.from_dict(operator)
-
-    eko.solve(theory, operator, path=output)
+    tc = yaml.safe_load(theory.read_text(encoding="utf-8"))
+    if "order" in tc:
+        tc = TheoryCard.from_dict(tc)
+    oc = yaml.safe_load(operator.read_text(encoding="utf-8"))
+    if "configs" in oc:
+        oc = OperatorCard.from_dict(oc)
+
+    eko.solve(tc, oc, path=output)
diff --git a/src/ekobox/cli/runcards.py b/src/ekobox/cli/runcards.py
index 1ad7d91d4..7fc46f1ef 100644
--- a/src/ekobox/cli/runcards.py
+++ b/src/ekobox/cli/runcards.py
@@ -2,6 +2,8 @@
 import logging
 import pathlib
 
+import numpy as np
+
 from .. import cards
 from . import library as lib
 from .base import command
@@ -34,6 +36,6 @@ def sub_example(destination: pathlib.Path):
     cards.dump(theory.raw, path=destination / "theory.yaml")
     operator = cards.example.operator()
     operator.mu0 = 1.65
-    operator.mu2grid = [1e5]
+    operator.mugrid = [(np.sqrt(1e5), 5)]
     cards.dump(operator.raw, path=destination / "operator.yaml")
     _logger.info(f"Runcards generated to '{destination}'")