Plausible mod? PolySix effects board in Mono/Poly?

I absolutely love my Mono/Poly, but I really miss the chorus/ensemble effects on the PolySix I no longer have. Has anyone ever successfully transplanted the PolySix effects board into a Mono/Poly? A quick look says that I just need to pull power, audio in/out, VCA envelope, and resonance settings, as well as add the selection switch and speed/intensity control. There should be enough room in the case with a little shuffling.
Is there anything I’m missing?