My EQ6-R Pro wasn't able to keep the RA setting circle calibrated for some reason (seems to slip even if the grub screws are tight), so I was always losing my manual home position (I need to move the mount manually after power off, so the driver home position is lost and then I need a physical mark to go back to the accurate home position when I power on the mount).

I designed pointers that goes on the RA axis. I've drawn the black lines using a fine Sharpie. The pointers are held in place with double sided adhesive tape.

*Make sure the one beside the mount's handle isn't too close to the rotating axis because the lower part of the RA worm gear casing is bigger and will hit it.

*Inspect also to make sure the RA setting circle grub screws pass freely under the fixed pointer (once the double sided adhesive tape is in place).