As an excercize in Modular Grid, drop a quarter of those modules. (so that's 26hp to sacrifice)
Conceptualy split what's left into two, planning each half as a viable synth, whatever it does, on its own.
Now, with that newly freed space in the middle, fill it with utility and glue modules.
Adders, offset/attenuators, active multiples, submixers. Stuff like that.
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