Well im glad you like them. My werks carb is aluminum and I never had a problem with it. I just think that ops should come up with a better carb. I had no problems tuning it. The carb would start to chang tune, it would go lean then rich with temps at 220-230. Its also huge, I spent 2 hours modifying my xb808 throttle to get the correct spring tension and still have enough throw for my brakes. I still will keep running these motors now that I found a carb.