Akai S1000 / S1100 samplers

Hi group!

Does anyone know the differences in functionality of EX1100 eprom 
versions 1.31 and 1.36 ?

And is it right, only S1100 OS version 2.02 works correctly w/ the 
EX1100 ???

Is the digital mainboard in the EX1100 absolutely identical compared to 
the one in the S1100 ?

I plan to replace a damaged mainboard in one of my S1100s by a mainboard 
out of an EX1100.

Does that work ?

thx in advance

PeWe