diff --git a/src/tools/clut/src/dngproc.h b/src/tools/clut/src/dngproc.h
index 8651c42e..19cb889e 100644
--- a/src/tools/clut/src/dngproc.h
+++ b/src/tools/clut/src/dngproc.h
@@ -292,8 +292,8 @@ dng_profile_fill(
   }
   if(illuminant == 2)
   { // D65 in XYZ (illum E)
-    p->wb[0] = 0.3127;
-    p->wb[1] = 0.329;
+    p->wb[0] = 0.31272;
+    p->wb[1] = 0.32903;
     p->wb[2] = 1.0-p->wb[0]-p->wb[1];
   }
 
diff --git a/src/tools/clut/src/mkssf.c b/src/tools/clut/src/mkssf.c
index 4869bf6d..84ad9e3e 100644
--- a/src/tools/clut/src/mkssf.c
+++ b/src/tools/clut/src/mkssf.c
@@ -16,10 +16,10 @@
 // - cfa model: plain gauss sigmoid pca
 // - optimiser: gauss/newton adam nelder/mead
 // - parameter: number of iterations
-static int num_it        = 30;
+static int num_it        = 80;
 static int num_epochs    = 6;
 static int cfa_model     = 2;          // default to gauss
-static int cfa_num_coeff = 20;
+static int cfa_num_coeff = 30;
 static double cfa_param[3*36] = {0.1}; // init to something. zero has zero derivatives and is thus bad.
 
 static double ill[2][CIE2_SAMPLES];    // tabulated illuminants for the two target shots