Thought I'd let everyone know that I had a good experience with gnlemont at Throttle Masters. Bought a plumber's manifold, and when I got it, the pipe ends were out of round to the point where I didn't think the seals would work properly. Sent it back, and he notified me that he would look through the ones he had to find a good one. Within a week, a new one arrived , with both pipe ends round within .002". Makes me a satisfied customer.