Thanks for all of the advice everyone!!
I'll triple check my power ribbon, and give it a go!
Thanks for the module/rack upgrade recommendations too. I will await the next big sale, once I have had a good play with what I have :)
One final question: do I need to do anything special to get my sound out?
I have a floating ring CV patch cable that ends in a jack that will fit my audio interface. As far as I can tell, that should be enough as long as I don't do anything stupid with the gain on the AI. Please correct me if I am wrong...
My Arturia has a CV out on it, so I am 99% sure I can go directly from it to the modular. Again, let me know if I am wrong.
Thanks everyone!