So the mix that would make our nights easier consists of ioptron's worm, Paul's belt/pulleys, better bearings and some cleaning/new grease maybe(superlube or else) ?
I have the new worm, and regreased it with SuperLube, and the new gear uses new bearings and one new pulley wheel, but the same pulley. So far, I think I'm set once I figure out the optimal PHD guiding settings for my setup. I still want to train the PEC and see how much of a difference it makes, but if one were simply to accept that guiding is always needed, I don't think I would bother with the PEC.
Having gone from around 60 arc sec of PE with some pretty steep ups and downs, to what I now estimate to be something like 6-15 arc sec of PE with a very smooth curve is really quite good in my opinion.