Super informative post about the inner workings and insight on the ZF movement MCD.
I myself have also been doing a lot of research between the ZF and 3KF for my 5167 project that I just completed.
I ended up going with the ZF case for donor as I personally believe aesthetically, it is more accurate to the gen.
After owning both, the bezel for the 3kf just seemed too squarish in my opinion while the ZF captures the subtle roundness of the gen aquanaut.
Most unique part of my build I would say is that legend was able to swap the 324 cal movement from the 3KF over to the ZF case and was then able to slim the ZF case down to around 8.2mm.
Needless to say, I am super proud of this build. I truly believe one of the better combination achievable currently for a high end build is still a culmination of gen (Dial + hands), ZF (case), and 3KF (movement) parts.
Here is my build:
Gen dial (pre 2009 no swiss) + Buff hands(all 3) and datewheel in ZF case
324 cal movement swap + modded to fit into ZF case
ZF case thinning to 8.13mm
Rebrushing of ZF case and bezel to gen spec
Gen strap + gen clasp + Everest springbars
Complete movement overhaul