Always. His **** is paid for, that's the difference.
What are you building, because there is a point where youre just trying to make a silk purse out of a sow's ear.
Maybe this isn't being realized...but most everyone's stuff on this board is a few thou off from deck to deck, end to end...most peoples ports do not flow exactly identical, rod lengths differ...in a lot of people's stuff. Most don't know it and the others do and don't give a ****, because it matters about 0-2 hp in what they're doing...in fact, the machine work they get done at prices some have deemed too/suspiciously cheap ...is usually more accurate than factory line stuff that went 100,000+k miles in the first place.