On that last bit: in theory, you can do that with the RCD, but your VCA envelope will simply be on/off, no contouring. To make that work optimally, find a couple of smallish EGs (two-stage would be just fine, IMHO) and trigger those with RCD clocks, then send the envelopes to the VCAs as control signals. You can lose the mult as well...I find them to be impractical in a small build like this, with inline mults and/or stackcables being preferable to losing 4 hp to a dedicated mult module where something active would make more sense.