Hi,
My mount had the original steel worm and 492 driver that I recently replaced with onstep with 400 steps motor and using 128 microsteps for tracking.
Here is a video of the g11 mount with onstep:?
The motor is directly coupled into the worm with an aluminum helical flexible coupling. So there exists no Oldham coupler and gear boxes.
You say I need replace the just acquired OPW bearings?
Thanks
Andre