Stuart - I've just hit a wall in the repro, and you've hit the nail on the head...
Field distortion is causing real headaches... Looks like I need to buy Registar... I can get the registration pretty good, better than before, but still there are some areas that remain misaligned..
You also hit the nail on the head over at CN too... I will need to refocus between filters despite the filters being Parfocal.. L and R seem fairly close (so close that I could get away without a refocus) however G is slightly out from L/R and blue is out from G..
This will make my imaging runs a little more time consuming, however I suppose personal struggle is part and parcel of the pursuit of perfection..
