Neal, I ran the BTT this past weekend for first time and have almost a gallon on it. Ran perfect all day and did not touch a needle all day. I pitted at 10 min in main and was still on the rich side of tune. I put your 6 mm carb mizor in between 2nd and 3 rd round of qualifying and did not retune. Noticeably better punch and mid range, I will do some testing to find my sweet spot. Motor is extremely smooth with 9886 pipe, was not a long enough straight to let it really turn max rpms. Thanks again for fast shipment and help!