Ultimately It's not the dealer that decides , it's head orifice .... He will have put a request in , the dealer gets paid like a normal warranty job.
It's good that you partial pay towards it because now you have an implied warranty on the job... with a receipt
Well done chap, when I read your first reply , I thought Oh god he didn't try hard enough and fell at the first hurdle lol ,, but then smiled when I read the final outcome.
You can pay me the 10% by bank transfer ,........