There's actually only one change I think I can suggest here: swap out the Pico Atten for a Pico A Mixer to submix your VCOs before sending them onto the filters. Losing a couple of attenuators is a decent tradeoff for being able to mix your oscillators and beef up your sound with detuning, etc. Plus, I couldn't find a similar set of attenuverters for that 3 hp space; those would've been preferable to the mixer, honestly, because you'd also get the ability to invert modulation signals in addition to rescaling their levels...and inverse mod signals can be quite useful, especially inverted envelopes.
-- Lugia
Yes, an attenuverter would be great. I've been looking around and it seems like Patching Panda has a dual 3hp attenuverter with additional sum and inverted sum outs.
https://www.modulargrid.net/e/patching-panda-flipanda
This could be a good replacement for the Pico Att, what do you think?
Regarding the power supply, I guess I could move the modules around and try to have the power suple next to a modulation source instead. Anyway, as I understand, having it like this could potentially add some noise into the audio path, but it would n0t damage the module itself, right?
Thanks for your reply Lugia, I really appreciate it.