I'm not speculating pea-turkey. The 800 has an internal crayford,
It may be semantics, but does the unit have a "crayford" style focusser,
( ie a spring loaded drive shaft using friction to grip the baffle tube )
or is the advance just that the sled itself is now on preloaded ball bearings.
Ie all piccies i have seen still show the focus knob "appears" to push the mirror sled via a tangent bar as per current mechanisms. The ball bearings mean a tight fit with no friction for the sled, hence no mirror slop, but it still seems to be just a bog std offset dual speed focusser mechanism driving it all???.
Why i ask is i always wondered if it would be possible to mod an std SCT to directly load the sled at the centre of the mirror, not via an offset pin as per now, thus removing the twisting force that gives mirror shift. I was thinking of using a pivoting lever behind the sled, but a motorised crayford gripping onto the baffle tube would also work.
Just wondering whats really in there???