Hi, just a note ... you'll need https://www.modulargrid.net/e/behringer-961 to drive the Boog Envelopes (otherwise you'll fail)
This isn't laid out like I recall the original IIIc. Shouldn't the CP3A-Os and 992s be on the bottom row? Why are there two of each, when the usual complement is just one each? And you're crippling the 904 filter pair in the upper right by not having the 904C coupler for them to work in tandemmed bandpass/notch modes. Plus, why all the attenuators? The CP35 (also should be in the bottom row, so you can use it to reduce the output to something approximating line level) takes care of a lot of this already. The sound should be right...but there's going to be some real differences in how this will "play" over one of the original systems.
Thanks for the comments. This is not an attempt to recreate a IIIC/P. It is based on my needs and preferences.
The 904C is not a module that is available to purchase. Maybe it wil be later.
As for the amount of attenuators and mixers, you can never have too many....hahaha