This is what I did... http://www.covington...ex.html#x171113
But tell me more about what you did. What exactly did you polish? And where did you get the nylon washers?
My dec axis turns about 1/3 as easily as a CGEM dec axis. (Requires 3x the force.) Is that about right?
Nylon washers from Lowes - $0.62
I did a lot...
- Removed all the sticky "grease" used by Celestron
- Polished ring gears inside and out
- Polished worm gears
- Replaced/adjusted worm bearings (ceramic bearings)
- Polished all other bearing surfaces
- Replaced the nylon/hdpe "bearings" with PTFE (from Ed Thomas)
- Replaced RA thrust bearing with an angle bearing
- Reassembled with a light coat of Superlube on all bearing surfaces
- Fine tuned worm and spur gear backlash
- Added bubble level to tripod
- Installed most of the ADM accessories
- Repaired motor control board after an overload caused a ferrite bead to pop off...repair worked, but replacement board also on order.
RA now moves pretty free, but Dec is much better than it was, but still stiffer that I would like. Both move very smoothly and I can get good stars on 5 min guided subs...probably longer, but I haven't tried yet. I'm considering doing a belt mod to replace the spur gears because that's where most of the backlash is, but I'm not sure it's worth the effort. Besides, I'll probably sell it soon anyway to fund a bigger/better mount (leaning towards the CEM60).