well I check the tune every time I fly and usually have someone there with me to make sure I have it tuned right and even on warm days where the engine is running perfect, I still need the whole strip to take off but that particular day I probably should have had a hotter plug. I've never used anything else but a medium temp plug in it. Haven't had anyone show me how to fiddle with different temp plugs. I'm gonna test out the bigger wheels and 11x5 prop on the 1st of the year for my clubs fun fly, weather permitting, so I'll let everyone know how that turns out. Maybe they will have rolled the field by then too