When adjusting the backlash, remember not to only adjust spur gear (motor) to spur gear (worm), but worm to worm gear too. Inserting cigarette paper with the spur to spur is easy - doing so between worm and worm gear is impossible (unless you want remnants of the paper ruining your guiding
). So, worm to worm gear mesh is CRITICAL, and also difficult without binding as most of it is done by feel (not sure with the EQ6 if you CAN readily see the mesh between worm and worm gear, but on my Vixens it is DIFFICULT).
Vixens have 5 adjustment bolts (4 space/tension bolts, 1 tension adjustment-balance/relief screw) with worm meshing. Not sure on Skywatcher.
Doing spur meshing is only half the procedure. I eliminated ALL backlash in my spur gear engagement, only to find a SIGNIFICANT backlash in the worm to worm gear - 2.5 hours of fiddling later, I was happy (and guiding, as shown below, was pretty darned good). That's with ST4 guide (guiderate set to 0.75 in the handset), not pulse guiding.
http://www.iceinspace.com.au/forum/a...e.php?a=181261