ModularGrid Rack

Hi all, newbie here. Here's what I have so far, I've had some good fun with it so far but would love some ideas on how to fill out the rest of my case. Leaning more towards an ambient/post-rock-ish rig but a "complete" or versatile rack would be nice.

I am also strongly considering the 4ms STS as sampling recordings, manipulating them and building off of that sounds like great fun. Any advice welcome!

Cheers