[Omaroo (Chris Malikoff)]

Derek - Don't bother about PEC training until you've verified the mechanics first.

What model of the LX200 do you have - Classic or GPS? Is it in polar mode (on a wedge) or are you forcing it to track in both RA & Dec simultaneously in AltAz mode? Tracking objects in AltAz is always a compromise, but you can do the following to at least soften the ill effects:

If it's relatively old, then you may benefit by replacing the cork clutch liners on both Alt and Az axes with Petersen Engineering EZ Clutch Kit upgrade from Bintel. Slipping clutches can lead to all sorts of irregularities.

If it already has brass gears then it is a relatively modern scope. If it's not, the old nylon gearing is most likely wearing and you may benefit from a set of Bucks Precision stainless steel gears. Firstly though, try removing the cover plates on both axes and see if the original red grease is still present and well applied - if not it's probably time to clean and re-grease with a good synthetic.

Once these have been at least checked THEN go ahead and try PEC training. Your problem sounds almost like a tooth is missing or you're getting some slippage - not merely that it isn't PEC trained.