I don't see why you can't link to photos or tutorials??? Maybe it's the case that there are two causes for mirrors to flop in an SCT design. Still the problem with them is that they flop and the only way to fix it is to lock down the mirrors.
Getting back to the OP original post I always want to see things when they break. I don't do that anymore as I figure I'm just as likely to get into worst problems by doing that. I had a terrible experience with a cooled OSC, it broke after 12 months! After having it repaired I got rid of it and got something "better". It wasn't, it was a very difficult camera to use which I only found out the hard way - after my 30 day return window had expired. So, unless it's a real upgrade I'd just bite the bullet and send it in. At least it's not a Paramount MX+.
I'll try to to post this link again:
http://www.darkatmos...ic/C11_Project/ (it gave me some kind of"cannot link to this image" error before)
and in the above photo you can see how the mirror sits on a flexible substrate atop the mirror cell. Locking the mirror cell will help but it will not eliminate mirror movement as Celestron states:
"...Mirror support knobs hold the mirror in place and reduce image shift during imaging..." (my emphasis)
I've had a front row seat watching a friend rebuild his RASA 11 to reduce mirror shift to minimal levels; locking the mirror via the mirror locks wasn't sufficient. He eventually came up with something along the lines in the first url, above.
Edited by DuncanM, 25 March 2019 - 09:15 PM.