This truss RC has 6 mirror clips, in addition to a central locking collar. The locking collar does not make contact with the mirror (a 3mm or so gap) and does not employ any type of o-ring. I’ve not seen this in an RC design before, and even the tube versions of the GSO RCs just use o-rings and the locking collar without clips.
The clips influence the star diffraction pattern. Is there any reason I shouldn’t just ditch the clips and put a rubbler o-ring on the locking collar myself and thread it back on? I mean the collar will prevent the mirror from falling out, so what is the point of having clips? The question there would be how tight should the locking collar and o-ring be? Should it even make contact with the mirror, or be spaced with a sheet of paper or similar?
Pictures of the cell and the locking collar with an o-ring I had lying around as a test (I’ve sense found a better one). There is also a picture of a mock-up of a custom nichrome heater I was thinking of building to place behind the primary on the cell (I’m not ready to glue something I built to the actual mirror). The purple paper is the shape the heater will take on, and the wire will be sandwiched between two pieces of high temp silicon sheet glued together with RTV.