|
Yep. The only reason the Tridob uses 3 Alt. pads on the bottom of its flex-rocker is that it had 2 front bearing fins and 1 at the rear. Use four for two standard Alt bearings, underneath each of the Alt. teflon pads.
I and others just sat the ground ring directly on the ground with this design - no feet. No reason you couldn't fit three feet to the bottom to make it even easier to rest on uneven ground - but the ring has to be really rigid!
The other approach always has three feet underneath the groundboard, with the teflon pads directly above each.
BTW - another advantage with using a rigid rocker/flexible groundboard for a larger scope is that you can shim around the central pivot to make the motions smoother in Az. As dobs get bigger the feet and therefore the teflon pads above them get further apart, which means more resistance.
Using the right materials and psi on the pads worked OK on the 16" Tridob because the design was so light, but shimming around the central pivot on the 22'' really helped improve the motions in Az.
If you are at all worried then I would go with the more standard but economical design as in scopes like the Obsession UC. It is simple to build, will work and you can add encoders later if you want.
|