Index: trunk/psModules/src/objects/models/pmModel_DEV.c
===================================================================
--- trunk/psModules/src/objects/models/pmModel_DEV.c	(revision 36857)
+++ trunk/psModules/src/objects/models/pmModel_DEV.c	(revision 36866)
@@ -124,5 +124,5 @@
     if (radius <= 1.5) {
 	// Nsub ~ 10*index^2 + 1
-	psEllipseAxes axes = pmPSF_ModelToAxes(PAR, pmModelClassGetType ("PS_MODEL_DEV"));
+	psEllipseAxes axes = pmPSF_ModelToAxes(PAR, true); // DEV uses Reff
 	int Nsub = 2 * ((int)(25 / axes.minor)) + 1;
 	Nsub = PS_MIN (Nsub, 121);
Index: trunk/psModules/src/objects/models/pmModel_SERSIC.c
===================================================================
--- trunk/psModules/src/objects/models/pmModel_SERSIC.c	(revision 36857)
+++ trunk/psModules/src/objects/models/pmModel_SERSIC.c	(revision 36866)
@@ -125,5 +125,5 @@
     if (radius <= 1.5) {
 	// Nsub ~ 10*index^2 + 1
-	psEllipseAxes axes = pmPSF_ModelToAxes(PAR, pmModelClassGetType ("PS_MODEL_SERSIC"));
+	psEllipseAxes axes = pmPSF_ModelToAxes(PAR, true); // SERSIC model uses Reff
 	int Nsub = 2 * ((int)(6.0*Sindex / axes.minor)) + 1;
 	Nsub = PS_MIN (Nsub, 121);