toddee,
Thank you infinitely for your detailed answer and the time you took to look at my current project and share your experience.
I'm starting to understand the reason why people tend to tell me to use a larger rack. I'm going to consider getting a larger (104) 6U case based on these advices to start the project. Also, thank you for the advice concerning modules, i'm now investigating into some VCA/enveloppe and/or LFO/enveloppe (any input appreciated).
As this rack also serves an educational purpose I still hope I could get started doing 'something' with these few modules modules and get a taste of what's missing from this point.
Do you think I still can enjoy the basic concepts with this setup before going further?