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Hi,
I expect you have one of 2 possibilities:
1) You have some loose screws under the cover aligning your RA motor or RA axis bearings, causing your gears not to mesh properly (sound like the most likely, given the sound you have mentioned) ... or
2) The grub screws affixing the head which holds OTA dovetail are loose or stripped
I play with my HEQ5Pro internals from time to time to minimise play/backlash ... happy for you to bring your mount over on the weekend for a look if you like.
Jeff
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