There is no such thing as "finish"... modular synths are endlessly evolving custom instruments... maybe a case will be full at some point, but there are always other cases...

I think there is such a thing as “finished” if you want it to be…that’s what my wife keeps telling me…
Thank you for your suggestions. Sometimes you just want someone to confirm what you’re already thinking and suggest specific modules that you can do homework on. That’s when you get the aha moments, and realise this module can do more (or less) than you initially thought. So many modules, so little time!