Although I stated I can reach 20.5 in 51.5 minutes on a decent night, tonight was not decent with poor seeing and ok-ish transparency some of the time. The killer, though, was intermittent thin cloud going by. Not yet had chance to go through the subs and through out the particularly bad ones. I had difficulty imaging (50000) Quaoar at V=18.9 in 102 minutes. Most certainly not helped by it being 3 arcseconds away from a star which is 0.7 magnitudes brighter.
An image may appear on my personal page eventually but it will not be pretty.