Bit of a long ramble is that reply my friend .
I fell asleep half way through .
Get it back fix it , give it back , don't let his chosen garage or his mate touch it in anyway .
15 hours is a joke .
Remember its 11 yr old and you are entitled to use remanufactured or used parts if you wish ,
*Golden rule* , fetch it back so its all under YOUR Control OR THEY WILL Rip your wallet for sure .
Mistake number 1 YOU let his matey fix it , bad move pal .