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Thanks for that Peter, Logan (Hi Logan, still very much enjoying the PMX).
There are no bits falling out of the housing so I'm guessing I won't need replacement belts - but, I'll open up the housing and check when the grease comes in and if I've got black belts then I'll get some replacements. Otherwise I'll give it a clean, get the old grease out and put new grease in, then clean the electronics and re-tension the belts, give it a wipe with a cloth and put it back together again.
Thanks for the tip on what was missed out in the video. I watched the video this morning. Chris makes it look easy!
Out of interest, I did do a PEC experiment around November of 2013 and ended up with the curve you see attached to this post. About the best tracking I've had is less than 1/2 pixel correction - but that was exceptional seeing and was in January 2014. It's held that solidly now for some time, but over the last 6 months has introduced more errors. Last session, I was getting over 3 pixel fluctuation fairly regularly and that makes me think I've got some backlash or dirt in the grease or something. Could also be the scope, but the mount needs a service anyway so I'll do that first and come back.
It will probably take a month for the grease to come to me, hopefully that will be good timing so I can do the cleaning (while the mount is warm so the grease spreads evenly) and another t-point run then PEC experiment in winter when we get better seeing here than other months.
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