So I did get my sample and hold mod to work. I had to attach different parts of the mod wheel pot to the MG1 or sample and hold switch. Maybe it was because I have the old revision mp or maybe the schematic for the mod is wrong.

Anyways, now what I found is that if I'm using the arpeggiator clocked by MG2 and the sample and hold clocked by MG2, the sample and hold is lagging. I think the S/H circuit is looking for a positive going trigger while MG2 is spitting out a negative going trigger. I could make a little trigger converter in my circuit to fix this. Anyone have any opinions or experience with this