Vintage Simmons Drums (UK) Users Group

Hi there,
   Does anyone know how what the "Prog Jigsaw" and "Prog Selector" LEDs 
do on the SDS7?  I notice that the buttons are numbered from 1 to 16, 
and 1 and 2 are also marked "E" and "N".  Does this have anything to do 
with it?

Also, does anyone have a list, or EPROM dumps, of the factory Simmons 
sounds?

Finally, I'm sure I remember reading about a mod that let the resonance 
control switch between different samples in a (larger than standard) 
EPROM.  Does this ring a bell with anyone?

Gordon.