- The bearings work well. Although the altitude bearings are of
small diameter, putting the pads at a wide angle increases the
frictional force to the optimum. The pressure must be much higher
than the 15 psi recommended for Teflon / Ebony Star, but seems fine
for whatever the yellow material is.
- It holds collimation well.
- It's very solid.
- It's too heavy to move around and set up easily. The complete
tube has to be lifted on and off the altitude bearings. Wheels are
then fitted so it can be moved in and out of the house. It's
awkward to get through the back door. The rocker / groundboard has
to be manhandled.
- The mirror cell is not ideal. There are not enough suspension
points (9) for a thin (30mm = 1 3/8") mirror. There's no sling. The
cooling of the mirror is slowed down by a thick aluminium
- It's difficult to shroud, so I haven't tried.
- Collimation is difficult, requiring two spanners to adjust each