BrewLiam Well not actually gone away yet - and I am sure someone will chip in - but I intend to empty out the main tank as much as I can via the hot water tap. Once the low level kicks in - I will empty the tank, rinse it and leave it until I am back. Probably a good time to run a back flush before emptying the tank as well..
The latest firmware I think added additional time so that if you were in the middle of a shot when the low water alert kicks off it would wait 30 seconds to allow your shot to hopefully finish. Not sure if this could be used to help get as much water out as possible. ?