Leak Down Test On My New 418 Need Help?

superchargeddrt said
I will try short full throttle blasts at 60 MPH along with gearing down when I come to a stop. I will NOT beat the dog snot out of it. If I don't see any improvement it will be going back to him for sure.

It won't/shouldn't hurt anything to do that. Sounds like a probable long shot at this point but it is no real effort.