My problem with my A7R, which I'm thinking this new mount might fix, is my MB IV adapter will frequntly lose the electrical contact (and aperture will go wide open), requiring me to stop to remount. That said, the adapter does not feel unusually sloppy on the mount. Hopefully, the new mount would not make that problem worse?
By the way, this problem does not occur when I mount the MB IV adapter on my new A6000, so I don't believe it's an adapter issue.
Assuming I go with the Fotodiox mount, I'm trying to understand if there is any risk during the mount replacement of stripping the mount screws or screw hole threads, which would render the camera unusable?