Just change the blocking plate from a pull-out-push-in into a rotate design.
When rotate to show up, the camera is ready for double-sided holder.
When rotate to hide in the chamber, the camera is ready for bayonet style holder, like Fuji PA-45
So this camera needs no any part to take off when changing the film back system, no springs, no screws, no gg plate to taking care of.
And recently I got a beautiful hood from an old lens Fujinar 6.3/150, not only fitted for it, also fitted on Symmar-S 5.6/100 and Angulon 6.8/90mm.