Same Comet, same conditions, same tree, same faff, different night:
Comet Pan-STARRS (C/2011 L4).
Subs: 25 light @ 30s, darks, bias frames, ISO1600.
1000D on the 6" R-C, unguided.
The main difference is that this time there's a time-lapse movie. I created it from 100 frames, each representing 30 seconds of exposure and 5 seconds of "gap", so that's nigh on an hour crammed into this 10-second clip: