Terrabeam special purpose hand selected 125, but uncoated, Wegat back. Tough to find.
Very early etx90s tended to be excellent to perfect.
Kind of a crap shoot though. Most are at least very good generally, I had one perfect 90 and 2 excellent ones. Sold them all because they were too small for me, but I still would like a top shelf 125.
Gave up on getting a near perfect 125 without having to buy, sort, and sell off several of them, and wasn't ready to pay the premium for a Terrabeam.
All of mine had excellent internal flats, so that ceased to be a worry for me.
If someone is willing to share a documented DPAC or other valid test method, jump on it.
The mechanicals are ... price driven. Autostar 497s must be handled carefully when unplugged, it doesn't take much (static??) to kill them. Ive had two die for no reason. The software is nicely set up though.
If you get a 125 do not mount a dovetail on the tripod base without reinforcing it etc. Rings are far far better, and help with eyepiece locating.
Edited by markb, 26 September 2020 - 04:17 PM.