Since the recent surgery on my battery pack I have done 7.85 amp-hours without any cut offs from the battery management system. So it would seem the early cut offs around the 6 amp-hour mark are a thing of the past! The minimum voltage this time around was 32.9, resting voltage was 35.8 and I used 288 watt hours.
The local bike shop is organising a Sheldon Brown memorial ride tomorrow which will involve a bit of distance and some hills thus I'm charging the pack up tonight so I don't run out of juice half way home! I'll probably aim to recharge around the 8 amp-hour mark from now on.