As another side note, the singular barrels are all curved as well, so I can see how they wouldn't work all that great with a flat plate. Ideally, a new barrel for flat plates would have to be designed and molded, and here improvements can be made for diy - exact outer 1/2" barrel diameter drill, smaller drill under that for the stabilizing pin, etc. Molding new barrels out of something like uhmwpe is pretty expensive, though. Not to mention that the capacitive feet would still need to be sourced from vintage boards..