That looks great, and I really love the experimentation and execution. I did this exactly about a year or two ago, but I didn't complete it, as the case was too thick for me with the gen spec bezel assembly. The BP 16710 disguises it's thickness by using a thinner than genuine bezel on a thicker than genuine case. The BP 16570 case is the same thickness as the BP 16710 case, but the thicker gen spec bezel assembly seemed like I was doubling up the thicknesses by combining a thicker bezel on a case that was too thick.
-Do you mind sharing the overall thickness of your completed piece?
-Is there a known source for a thinner case back?
-Are there any workarounds for thinning cases without a lathe or milling machine?
-You mentioned a BP 1675 case could work as a base too. Isn't the rehaut too small for the dial opening and gen spec bezel assembly?
I'd like to revisit my own (identical) build after seeing yours. It looks great! I just want a way to thin the BP 16570 case somehow.