I have to say that I have been pleasantly surprised with this scope apart from a bit of dust, mechanically it is excellent and optically it seems great, given that I have no other SCT to compare it against. I am also converted to this design. I do know for a fact that the scope is not perfectly collimated as out of focus star images and rings are off centre but I am getting some magnificent images off centre. The motor drive is also quite accurate although a bit of a pain as it requires 240v and cannot be run from a 12v car power plug
As mentioned, Star images off centre are perfect and planetary images are fantastic, I have never seen Saturn so clearly before.
How would you guys rate these scopes? I believe the one I have could not possibly be from the early eighties. The coatings are all perfect and the mirrors are again pristine.
I attach a picture of the scope and an accompanying image of Saturn