Index: trunk/ippconfig/recipes/psphot.config
===================================================================
--- trunk/ippconfig/recipes/psphot.config	(revision 41447)
+++ trunk/ippconfig/recipes/psphot.config	(revision 41449)
@@ -884,4 +884,28 @@
 END
 
+## YSE lens SSdiff phot 
+YSE_LENS_DIFF    METADATA
+  PEAKS_NSIGMA_LIMIT_2              F32  3.5           # peak significance threshold 
+  DIFF_STATS                        BOOL TRUE          # Calculate diff-specific stats
+  OUTPUT.FORMAT                     STR  PS1_DV5       # Format of output file
+
+  PSF_FIT_MODEL_SUM_FRAC_CUT        F32  0.5
+  PSF_FIT_MASKED_SUM_FRAC_CUT       F32  0.1
+
+  CHIP_PARAMS                       BOOL FALSE
+
+  ## from STACK_DIFF -- not clear ever used or needed
+  ## Extended source fit parameters
+  ## these models are used for high-quality shape analysis after all sources have been removed
+  EXTENDED_SOURCE_FITS                BOOL  TRUE  # perform the detailed extended sourc fits?
+  EXT_MODEL                           STR   PS_MODEL_TRAIL
+
+  ## extended source models applied to sources
+  EXTENDED_SOURCE_MODELS METADATA
+    TYPE      EXTENDED_SOURCE_MODEL  MODEL            SNLIM   PSF_CONVOLVED
+    TRAIL_RAW EXTENDED_SOURCE_MODEL  PS_MODEL_TRAIL    10.0   FALSE
+  END
+
+END
 
 # Recipe overrides for PR reduction
Index: trunk/ippconfig/recipes/reductionClasses.mdc
===================================================================
--- trunk/ippconfig/recipes/reductionClasses.mdc	(revision 41447)
+++ trunk/ippconfig/recipes/reductionClasses.mdc	(revision 41449)
@@ -368,4 +368,17 @@
 END
 
+## YSE lensing stack and SSdiff reduction class 
+YSE_LENS         METADATA
+      DIFF_PPSUB      STR     STACKSTACK
+      DIFF_PSPHOT     STR     YSE_LENS_DIFF
+      JPEG_BIN1       STR     PPIMAGE_J1
+      JPEG_BIN2       STR     PPIMAGE_J2
+      STACK_PPSTACK   STR     STACK_NIGHTLY_1DG
+      STACK_PPSUB     STR     STACK_1DG
+      STACK_PSPHOT    STR     STACK
+      STACKPHOT_PSPHOT         STR     STACKPHOT
+      STACKPHOT_SINGLE_PSPHOT  STR     STACKPHOT_SINGLE
+      STATICSKY_CALIBRATION    STR     STATICSKY_NIGHTCAL
+END
 
 APTEST_V1		METADATA