Casio Collectors

Hi All, Can anyone kindly suggest any 'musical' bending points for the RZ-1 drum machine? 

I'll be setting up some rotary switches for some dataline bends but wondered if anyone had some other points for muffling, timing, body-contact, etc.

I didn't want to go crazy with a patchbay, just some useful altering via a couple of six way dials with some trimmers if needed and body contacts if possible (just have to be careful with the AC).

A schematic would be a god send.

Cheers.