DaveP, just a thought re; the air blower. I'd be careful about using it. If the pressure/velocity of air is too great, you might end up blowing lots of dust/dirt particles onto/across the Eyepiece & putting fine scratches in them. This is why most use a camera puffer brush.
L.
ps. Ken, your 'Flying Saucer' is leaving a vapour trail in the shape of a spiral. Has he been doing 'Donuts' as well?