With the traxxas 20% I was at factory settings 4-hsn, flush-lsn. Idle gap was about 1.2 for me. Switch to Odonnell 20% RTR and I had to lean it out a little bit to say 3 7-8's HSN, and a 1/16th in on the LSN from flush, but it seems I have to tune the darn thing everyday anyway...