HI Everyone,
This has taken quite a while over several nights. The CNC spider on the Quattro has made such a difference with collimation holding for days. I think that the stock spider is the problem that has been overlooked in forums where people have been struggling with stock Quattro reflectors. I'm using the stock focuser which holds my kit with OAG perfectly without tilt.
RGB plus 208 x 300sec Ha, and 40 x 300sec OII and SII. Antila 3.5 nm. ASI 183 MM and MC. Quattro 800.
RC Astro Star and Noise Exterminator and Affinity. DSS.
https://www.astrobin.com/m97zkx/0/
Feedback welcome.
Chris.