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Hi Simon,
Well that s pretty odd! Your uncorrected PEC is just within spec. On my MX uncorrected was around 3 arc-sec. I never had a PEC from PEMpro not work. Certainly it won't work if inverted, but whenever I changed the phase things got a lot better. How Was your seeing? Late at night is usually better. By the way, Ray stated that one really ought not to do more than 5-6 cycles. He said doing more makes it harder actually for PEMpro to see the PE. So, you can save time next time you try. Personally I wouldn't expect TSX to do better. In fact only a few people I know got a good result with TSX in the Southern Hemisphere, and, nearly everone reports that PEMpro does a better job. Are you certain that all the settings in PEMpro are correct? I'm not sure if the MX and MX+ have different worm periods. They might so be sure you have the right mount selected!
Another option you might condsider is that you can try swapping your two worms. It might be that your DEC worm has a better spec than your RA worm. A fair amount of work, but I'd persist with things as they are. I take it that you did adjust the 1/4-20 bolts? Things are quite firm in RA? You can check this visually by pointing at a distant object during the day (could be with a high powered finder scope if you don't want to remove your camera). Using a reticle notice if when you rock the scope gently in RA that the object you centered returns to center after releasing pressure. It should and if it doesn't is a sign of hysteresis.
Peter
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