Hi B,
yes I did lap the RA worm but I didn't use carborundum (from my mirror
grinding kit days) because I didn't want grit anywhere near the workings
of my lathe.
I used cutting compound and used the worm section (not the hob).
I took a little more time to lap the RA gear, the DEC didn't get any
attention I don't think.
Post 117 shows I measured the PE at +/- 5 arc sec but I have since
found that the PE changes 'around the clock face' of the worm gear
due to the self index creep. (That's with PEC turned on BTW)
I have different PEC files I call up depending on what 'hour' of the
RA I use.
thanks for the links mate, I'll give them a look when I'm home from
work.
Steve