This was my first attempt at building a rack.
I was looking for versatility, multiple voices, and sequential control with gate switches, So, I have an Eric Synth voice, Roland voices, an Oberheim styled voice, FM voices, plus crazy saws and squares. I have filters, vcas, effects, sequential switches, etc.
If I need more, I have semi-mods Behringer Neutron and Model D to supplement and build on.
Logic Pro X, VCVRack2 and Reaktor Blocks also supplements this rig. Expert Sleepers helps with the CV/Gate connections.
Please note: the uZeus cannot be safely used in this rack, it is a placeholder. I actually use a PSU from an old computer to supply power instead.