you could buy another gp with 2 grand lol
you found the right place then. 99% of us refuse to pay a shop unless its stuff you just cant to at home, like an alignment, the only reason its been to any shop since I've owned it.
you'll also want to check if the lim gaskets have been up graded to metal ones yet. look where the lower intake meets the head, if you see a black gasket its plastic, see silver its metal already.