Hi, Russell,
A shot to be proud of. If you want to improve the SNR, go for the longest subs you possibly can within the limitations of everything else. Push on till differential flexure (with OAG you can go a long time) or field rotation are starting to be limiting, or until you're starting to burn out or the background is getting too bright. Reason: every sub has one dose of readout noise. Ten short subs have ten doses of readout noise. One long sub has only one dose. Once again, a great shot.
Best,
Mike