Thanks for that.
Very reassuring , although the link was way Over my head I get the idea.
These old scope designs were chosen to be forgiving and then workmanship adjusted by hand for each one.
Then the mounting is basically a car axle with hand cut alloy gear where the wheel would be. Very robust in the best Henry Ford tradition
QUOTE=Wavytone;1388888]No need it has been done - see
https://www.telescope-optics.net/SCT...tions.htm#than
Bottom line is that the classic Meade/Celestron SCT is relatively insensitive to decentering errors (ie lateral shift) of corrector + secondary. What it IS sensitive to is a tilt error in the secondary - as every SCT owner will know.[/QUOTE]