I keep flip-flopping between having basically a monome + mannequins set up (+ a few extras) in a 104x3u little toolbox case, and adding a bunch more stuff in a 104x6u case. Probably smart to keep it simple! I need to get my head back into Teletype and W/, specifically, as my head has been elsewhere and I feel like I’ve basically forgotten everything. 
edited to attach a modulargrid pic, and then I kept typing:
it’s in a beautiful little Pittsburgh Modular Move 104. Always struggle with module placement in this setup, too. Especially the Telexi and the W/ (and sort of the Cold Mac) since I typically like a left-to-right signal flow, but also know that those modules like some space (or a row-end) for easy manual manipulation.
It’s also missing some handy modules that I’d include in a larger case (mix/attenuate/invert is nice with JF, full size Clouds, VCAs, more FX, dedicated modulation and/or envelopes, etc).
Honestly the other large part of why it’s in this case is that it uses floating nuts to attach modules, instead of a pre-drilled rail, and Teletype’s holes are weirdly aligned (as is my OG Earthsea).