Nevermind what I wrote there. I solve my problem, as well as yours.
http://gaussmarkov.net/layouts/gristle/gristle-perf.pngJust follow the wiring diagram on the gaussmarkov page. Ignore the PDF wiring and you should be fine. I now have no issues with the distorting volume or anything anymore with mine following this wiring.
Thanks thedefog! I have rewired the rotary pot. Had some success...
Now I know this is not correct as following the layout, but by wiring A3 and A4 together, as well as A4 to B1, I am getting some quite 'throbbing' sounds on this setting. All my pots are external at this stage. Got a trim pot for SHAPE today. This pot seems to do nothing in my mind. However, with my 'bent' A3 to A4 mod, using the OFFSET and SPEED pot, I am getting some very nice undulating sounds... if you like that type of droney thing. I'm plugging an Atari Punk Console into it to get a single tone.
I'm almost thinking about leaving it as this, as this hack seems to be the mode I keep coming back to. And no, I'm not sure why this is. I have little experience with this DIY stuff and am a solder-by-numbers person at this early stage.
I wouldn't mind slowing it down further though. Perhaps increasing a cap value somewhere?