I'm trying to decide which tuner to buy.... I posted an ad that I want an SCT II but I wanted to get input on what people are using. I have the Kenne Bell S/C on my 2000 HD and it has a very "safe" tune on it that KB programmed into a removeable chip. It runs like a rich pig and needs some slight adjustments. I don't think they took into consideration the altitude that I live in, etc. Let me know what you think would be the better one to buy. I have a friend with an L that has a tuner guy who has helped him get his L running absolutely AMAZING! I'm hopeing for the same out of mine (to get it running at optimum performance, that is.)