Thanks for the reply - I have updated the rack based on your suggestions. I also added in another VCO of the Tabo Mirror as like the drone it puts it out - but not sure if overloading or if the space could have been used for something else?
Another thing I was considering but I don't know if a better idea or not, is to just get a pre built system like the Erica Synths Fusion 2 and just add things to it in a separate rack?