@Toccata and @JimHowell1970 Thanks so much for the detailed feedback and for thinking through some patching examples for this rig! As you say, finding out something doesn't work as intended after putting so much into this rig would be disappointing, to put it mildly. I hadn't even considered the possibility that I'd could reach a point of diminishing returns concerning the number of LFOs, attenuverters, etc. Planning out a system based on manuals and youtube videos is fun, but definitely misses the experiential aspect that would allow me to really get a feel for how the pieces interact with each other. I really appreciate y'all taking the time to guide us less experienced wigglers through this morass of modules.
You say in your layout description you have 'MIDI in the bottom left' but you have the ES-8 which is an Audio Interface, I think. You might be thinking of the FH-2 instead yes? That does MIDI to CV conversion so you can play from external USB devices and your DAW, etc.
Much appreciated, you're absolutely right. Thanks for catching a silly mistake!