Hi Simon,
I bumped into you today before I saw your post.
On this link you can read about the scope, but the problems listed are only minor compared to what I found when I started pulling it apart and began testing and measuring all components:
http://myastroshop.com.au/ssmassey/r...-10-review.htm
Getting back to the Honders, I did put into it only a few hours since my last post, but not so my 3D printer. The second set of 3D prints for the sacrificial OTA mandrel is done. Another marathon, 52 hours of printing.
This mandrel is 10mm smaller in diameter than the first one.