I threw photons over the entire endcap in the pt range 6-10 GeV.  Plots below are of reconstructed tower energy in the entire endcap divided by the input energy.

Reference Plots

--CVS ecalgeo.g file run with no LOW_EM option (left) and with LOW_EM option (right)

Note change in x-axis binning and range in plots shown for Test 1 to Test 6 below!

Test 1

--Replace PbAlloy in v23 with Material Lead

--Extra SMD layers turned off

--No LOW_EM option

Test 2

--v23 with Material PbAlloy isvol=0

--Extra layers turned off

--No LOW_EM option

Test 3

--Make v24 = v23 with Material lead + copy all cuts from cvs file

--Ecal_set_cuts subroutine deleted

--no LOW_EM option

Test 4

--v24 above with LOW_EM turned on

Test 5

--Make v25 = v24 with extra SMD layers turned on

--No LOW_EM option

Test 6

--v25 above with LOW_EM turned on

Comparison Plots

For these plots I change the x axis binning and range back to the reference plot shown at the top.