Can I change the yardage increments on the yardage scroll wheel under the Calculate Simple tab? It comes @ 25 yard increments which I believe is too much for any decent distance. Also, if I set the app. to consider spin drift, it does not ask length of bullet or twist of barrel--should it? Fwiw, I'm very impressed so far (I have not used it actually shooting yet) with BulletFlight. It is really simple and quick and matches my known dope very accurately. I do wish Bryan Litz's g7 bcs were not hidden, though. I have version the $30 military version 3.1.0 if that matters. Thanks