Ah yes, but by screwing things up you learn, too. Maybe it's just to keep your paws off what you don't understand, but that's not the answer either.

I'm a tinkerer. Had nine different drop-aways on my bow last year. Playing and playing to get very last fps out of the bow. That's how you learn how it shoots and how it should shoot. And by becoming familar with it you'll know when something is amiss. Bulzeye cover it pretty well.

To that end I can say I've been shooting compounds for over 30 years now. Never have I had one in a shop for anything. I tear them completely apart and then put them back together. Tune, tinker, tinker, and tune some more. I change things on my bow more foten than I change underware---well, almost. Just like yesterday. I changed the drawlength on my bow just to see what results I'd get. I made it 1/2" longer. Let's just say the results were quite ugly. But if I didn't try, how would I ever know for myself?

For you to know your bow is a good thing. As Bulzeye said, Easton's Tuning and Maintenance Guide can be a big help in the right direction.