diff --git a/image_analysis/indexing/FitProfileRadius.cpp b/image_analysis/indexing/FitProfileRadius.cpp
index bd63a708..43ef5f2f 100644
--- a/image_analysis/indexing/FitProfileRadius.cpp
+++ b/image_analysis/indexing/FitProfileRadius.cpp
@@ -5,32 +5,6 @@
 #include <algorithm>  // std::nth_element
 #include <cmath>      // std::fabs
 
-std::optional<float> FitProfileRadius_MAD(const std::vector<SpotToSave>& xs) {
-    std::vector<float> absx;
-    absx.reserve(xs.size());
-    for (const auto &s: xs) {
-        if (s.indexed)
-            absx.push_back(std::fabs(s.dist_ewald_sphere));
-    }
-
-    if (absx.empty())
-        return std::nullopt;
-
-    std::nth_element(absx.begin(), absx.begin() + absx.size() / 2, absx.end());
-    float med;
-    if (absx.size() % 2 == 1) {
-        med = absx[absx.size() / 2];
-    } else {
-        auto it1 = absx.begin() + (absx.size() / 2 - 1);
-        auto it2 = absx.begin() + (absx.size() / 2);
-        float a = *it1;
-        float b = *it2;
-        med = 0.5f * (a + b);
-    }
-    // Normal consistency factor for MAD
-    return 1.4826f * med;
-}
-
 std::optional<float> FitProfileRadius(const std::vector<SpotToSave>& spots,
                                       float bandwidth_sigma, float wavelength_A) {
     double sum_squares = 0.0;     // measured excitation-error variance (sum dist_ewald^2)
diff --git a/image_analysis/indexing/FitProfileRadius.h b/image_analysis/indexing/FitProfileRadius.h
index c63f7288..803d04cc 100644
--- a/image_analysis/indexing/FitProfileRadius.h
+++ b/image_analysis/indexing/FitProfileRadius.h
@@ -8,8 +8,6 @@
 
 #include "../../common/SpotToSave.h"
 
-std::optional<float> FitProfileRadius_MAD(const std::vector<SpotToSave>& spots);
-
 // Intrinsic excitation-error (mosaicity+divergence) width from the indexed-spot spread. When a finite
 // energy bandwidth is given, its radial smear (bandwidth_sigma*lambda/(2 d^2)) is deconvolved out, so
 // the result is the intrinsic width and bandwidth is not double-counted by prediction (which re-adds
diff --git a/rugnux/rugnux_cli.cpp b/rugnux/rugnux_cli.cpp
index d1e1e66f..383625d9 100644
--- a/rugnux/rugnux_cli.cpp
+++ b/rugnux/rugnux_cli.cpp
@@ -1425,6 +1425,10 @@ int main(int argc, char **argv) {
     scaling_settings.CaptureUncertaintyCoeff(capture_uncertainty_arg.value_or(rotation_indexing ? 1.0 : 0.0));
     scaling_settings.ForcedMosaicity(forced_mosaicity_arg);
     scaling_settings.MinCCForImage(min_image_cc / 100.0);   // --min-image-cc is in percent; the setting is a fraction
+    // The per-image CC filter is consumed by the stills merge (MergeOnTheFly) only - RotationScaleMerge
+    // never reads it - so on rotation data it would otherwise be accepted and silently do nothing.
+    if (min_image_cc > 0.0 && rotation_indexing)
+        logger.Warning("--min-image-cc is ignored for rotation data: it filters the stills merge only");
     scaling_settings.OutlierRejectNsigma(
         outlier_reject_nsigma.value_or(rotation_indexing ? REJECT_OUTLIERS_DEFAULT_NSIGMA : 0.0));