Well I gave the drill a go and it was great. I set the worm where I felt it needed to be (either Dec or RA) and then ran it at a moderately slow speed with the torque set at the 4th lowest setting. I went back and forward a few times, loosening off the worm each time it bit. Once I got a free run I lowered the torque again and repeated. Each time I checked by hand that the area that was tight was free enough to turn by hand with just a little bit of pain. Now it only jams on torque 2 and I can move that quite easily by hand. Too easy. I'd better check that my mounting blocks are aligned before I jump too much for joy
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