Sorry more a message to say "wow", that 's my first conical mirror I've seen on ISS since joining...
I see side real trading did sell the TS cell at one stage, if no-one here helps out, they might be able to suggest something.
I have seen very few articles about them, them normally just have a single center bolt for security and another for collimation.
Steve
https://www.siderealtrading.com.au/p...rimary-mirror/