NP - have you checked out the maths illustrated manual - even if it doesn't inspire you to buy a maths, it may inspire some patching of the quadrapol/Delta-v combo!
I just had another look -
again - kinks and a matrix mixer (AISynthesis do a reasonably priced, reasonably sized one) will massively expand your modulation capabilities for a reasonable price
I'd probably also want some more audio mixing options - I see a 2hp mix for submixing the drums and a unity for audio and the quadrapol/delta-v for cv, but it doesn't really seem to be enough - maybe a quad cascading vca such as veils or intellijel
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities