In the build above, I'm pretty sure the Atten-B are not compatible with a Palette case, and I have my doubts about the Unity Mixer as well.
-- toodee

That would be correct, actually. Intellijel tile rows CANNOT fit "original" format tiles, only Intellijel's version. Both Pulplogic tiles as well as the Unity Mixer won't work here.

Frankly, if you're doing a Palette case build, you should look into Plum Audio's Intellijel-format tile versions of devices like the Ornament & Crime, which fits very well into the scheme of things that Mutable's modules are part of. And while I'm shocked to be saying it, there may well be too many VCAs in here for the build's scale. A better choice would be Happy Nerding's 3xVCA, which gives you enough VCAs in a splittable configuration that also allows for some simple VCA-controlled mixing.