This drawing has an error probably because you saw Michael Herman's drawing and don't understand how this is supposed to work.?
The bearing's outer shell is the part that is pressed by the spring disc NOT the inner race which carries the worm!
By orienting the spring disc to contact the inner bearing shell or possibly worse the bearing dist cover you are creating pressure and drag where it should not be and potentially leaving the problem of unloaded bearing balls in the bearing unchanged.?
This drawing needs to be replaced with the correct orientation not just an edited text.?
Please believe me on this point as was adding Belleville spring discs to HEQ5 and EQ6 mounts before the GOTO computers were standard to solve this issue and the impact of thermal changes. Bearing induced PE is not unique to Losmandy mounts but it is more obvious because there is no threaded cap to retain the bearings which can e used to preload the worm bearings.?
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Chip Louie Chief Daydreamer Imagination Hardware?
? ?Astropheric Weather Forecast - South Pasadena, CA?
Chip Louie