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apart from belt mods we've had some improvement by fitting better constant velocity profile gears. These along with a PierAstro kit (ceramic hybrid bearings all round, steel shims, motor nose bearings, etc) made a huge difference. Lapping the Gerlinger worms was the final touch, about as good as it gets now. The main sorce of grief in these mounts is the worm end float control. I'd like to drill/tap the end covers and fir either a pointed hardened grub screw or a small spherical saphire lens to make a jewelled movement ;-)
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