I personally beleave in group tuning. Just take one of your arrows and scrape all the fletching off of it. Then, shoot a group of regular arrows, then shoot your bare shaft in the same group. It should be right there with the others. If its hitting low, bring down your nock point, if its high, bring your nock point up. Just play with it. Be careful though, i was doin it the other day and robin hooded another one of my good arrows. The main thing u want is all your energy behind your arrows, and thats not happening if your arrows are wobbling all over. Try the bare shaft method though, once u get it really close, shoot your broadheads, they should be right there.