JAM UPDATE 20. Moved a few things around yesteday to better facilitate the workflow I want. This basically involved getting the RV-500 off of the pedal board and next to the Subharmonicon so I could pan layers. That worked well, but it was still missing something ....
So I tried something else. I removed the Rane parametric EQ and put an
old Behringer 2-channel compressor into the signal chain. How old? So old it says
Made In Germany on the back panel.

The compressor definitely gave everything a much darker sound so I adjusted the EQ on the SSL a bit to compensate.
I then made a couple of tweaks to the note choice in Subharmonicon's sequencers.
The jam I recorded was 19 minutes long and
much closer to what I am going for. The overdubs weren't perfect, but now that the RV-500 is up where I can get my hands on it it's much easier to manage.
Another day, another attempt!
In the meanwhile, I reached out to a couple of recording studios that look like they might be a good match for the music I am recording.