Plugged it in for 30 mins, it was okay for 15 mins, then after that it was idleing all over the place. Left it for a total of 35 mins then gave it a few revs to stabilise the idle. Took it for a gentle drive for about 20 mins or so, then gradually fed a bit of boost in. Parked up and started off again with a gentle drive the next day, fed boost in over a few miles then properly put my foot down, it was spot on