I just wanted to get on here and let every go engine user know my expeirence with (22racer) Rex. I bought a worn out go .21 5 pt. from a fellow member and was having problems with it. I sent it to Rex and he put a new rod new boot and pinched it for me. This motor has been spot on. I am so happy with this engine now, it runs like a new engine, and is consitant. I would recommend his services to anyone that needs a pinch. Thanks Rex!