Thing is if you do it right the first time, you should not have to mess with the low end again, like for whatever season your in. Now the high end is a daily deal. I have not lost a plane or had an engine quit on me in a few years due to tuning. I may proclaim myself to be an excellent engine tuner but I am just as prone to stupid crap happening as the next guy. Fuel tanks splitting, mufflers coming loose , blowing plugs and the rest of it.

Whenever this happens, engine tuning is last on my thing's to check out.