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I am using the ABEC7 class of ceramic bearings from VXB of USA, however I found out later that they are actually rollerskate bearings!
I've got lots of teflon washers left over (in fact my spacer thickness is much less by three-fold than what was originally installed in my EQ6!!)
If you can tell me the thickness you want I'll pass the closest one to you for no cost - PM me
The spacer that is important is the one that sits underneath the brass worm ring gear, the other ones on top of the 6008 bearings determine the gap you will end up with between the assembled parts of both axis - that's where the aluminium graduated collars with the markings of hour-angles (RA) and degrees (DEC)
HTH
Cheers
Bill
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