I have had the scope for three weeks now and have used it three times. That’s good going in the UK in case you possibly thought that’s bad; it’s not uncommon to wait for six weeks for a first light in our cloudy climate!  Anyway, leaving aside the usual British moans about our weather……The FSQ is so easy to use.  Just point it, focus and forget.  I am using Baader LRGB filters in 1.25″ guise in an Atik EFW2 filter wheel.  These filters are stated to be parfocal.  However, with my Skywatcher ED80 telescope I found they were not.  The focus wandered slightly between the filters.  I normally focus on the Luminance channel first.  I then grab LRGB in that order.  But by the time I got to the blue filter I found stars were becoming bloated, not massively – but enough to take the edge off the picture.  This…