Caps are mostly an obstacle for me to design around. But as a user, lots of caps are great! Don't really care what color they are.
So I just confirmed the paper prototypes fit perfectly:
It will require using one of the motherboard standoffs. It will be a solid mount since (A) its going to a motherboard standoff, and (B) the inlets are mostly within the triangle the mounting screws.
here is a view of the space between the second PCI-E card and traditional bitspower fittings. I think its hard to see, but if you draw a line parallel to the PCI-E slot, the widest part of the inlet is tangent to the release arm. So that leaves enough room I think. Its a simple fix if it isn't enough room. Probably won't be compatible with the EVGA Hydrocopper video cards since they are so much thicker then traditional GPU blocks.
As I see it now, the design process is done. Just waiting on some machine time to make one. I will probably go right into production since this paper version is spot on, and there really isn't much to these blocks. They are very simple and that will translate to cheaper for everyone.
Now, aside from the boards owner... who wants in?