The last page of the SIMMONS SDE Expander manual is missing, I think it's the back cover. It contains information about the sounds (voices) and parameters.
If anyone has a copy, please send it to me so that I can add it to the PDF.
Source:
** PDS3500 pdf manual from the Digitech archives.
*** SDE pdf manual from the Simmons.Synth.Net web site.
**** PROCUSSION pdf manual from the E-mu archives.
***** MXB1002 pdf manual from the BEHRINGER web site.
The manuals are for discontinued products, I dont think there should be any problems making them available here...in any event, drop me a line and I'll remove whatever it is that should not be made available here !