funny... mine is in right now to have it adjusted cause i am with you. i want it tight. i tried and got it tighter, but just cant get it "right".
they also discovered a leak in a head so they are tightening that too. very small amount of oil on the engine at the top end.
mainly took it in cause i had a light out. of course, when i got there it was working fine!! they will check for loose connections.