Fred, yeah, I've heard lots about 0.060 too, I think it's even reccomended for the R44XLS, but I've never got anything to run well with them that wide. Maybe my choice of coils?? Who knows, but I gave up years ago trying anything above 0.045 - found it caused stumbles on WOT acceleration. Brad is still trying to get his truck going, 0.035 is a gap that is at least will give a good start and idle to mid range. A thought though... Geography; I'm 700 feet above sea level here in Toronto with about 29 inHg. Would altitude make any difference to gap reccomendations?