Many times for me, I tune quickly before the first flight of the day, as it warms up I may need to retune if I got to the field early in the morning. Generally for me, it was a tune first thing, maybe the second time and after that, I dont touch a thing. My glow planes have been knockaround planes and so I am not terribly fond of tuning and tuning and tuning. I know one guy that spent 45 mins tinkering with his glow plane and then after messing with everything and not getting it the way he wanted, he packed up and went home to change out all his fuel lines. All while he did this, I was flying and saying to my buddy standing next to me, "sounds great, when is he coming up with me?".. I remember tuning the crap out of my Revo all the time and I hated it. I found airplane engines to be a treat by comparison..