Have you looked at Really Right Stuff and Kirk Enterprises, they are machining the parts you are making, basically a sick release plate. But they are now ubiquitous enough that I would hate to see yet another quick release style. Never been a fan of the large ManFrotto/Bogen style. Take a look at the two aforementioned, I think they take a cue from Arca/Swiss, and are some of the nicest designs in quick releases that I have seen.