higgins

Here is my attempt. Ed80 pro d5300.

Hi Marco, My suggestion is to follow the excellent guide from astro baby for the declination axis strip down to be able to remove the worm carrier. With the carrier off you may be able to turn the grub screw from the inside with pliers or grips, then replace with a new grub screw. Then follow astro baby's reassembly guide to put it back together and adjust the backlash correctly. Hope this helps. Good luck.

Try drift alignment. If you Google DARV (Drift Alignment by Robert Vice) that should get you polar aligned as accurate as any method, better than polaris view. Edit -just noticed its been mentioned.