Outside of the accuracy of the camera mount, accuracy isn't a huge issue. Using an enlarger, the lens is on a bellows, so I am not worried about precise depth of anything else.
The material itself was one of my biggest concerns, as I wasn't sure if, with wear and tear, it would leave a residue or something else on the camera's mount that could damage it. I haven't worked with it before, and don't know anything about plastics like this. I also doubt one off machining would be cost effective for this.