Hi Brutus
I was hoping to break-in with two tanks of fuel (my test stand has a 20oz/600ml tank). Then i'll go and do some very gentle flying to help with the cooling.
Its pretty hot weather here at the moment.
With two tanks of fuel on the bed it would probably give me about 1 hour 10mins. But if needs be then I'll do 3 tanks then go and fly it gingerly.