Not to derail too far, but at what point is it considered knife edge? My xMagic is just parallel with, and (almost) touching my last metacarpal, what I’d refer to as P4/R4. Would that be considered knife edge? I don’t know if the positions are distinguished. I imagine knife edge to be more… On the side?
Edit: I clicked the “P4” link from my own message and it answered my question. Well I suppose it’s there if anyone was wondering the same thing 