wow, das allot of money geez . . . if i were to get a tune from overkill and then later on a couple months later get a dyno tune. does the dyno tune erase all the info on the pcm and reflash it or does the dyno tune just change certain information on the pcm and save to memory. and if it only changes information in certain areas will i beable to benifit from overkills settings and the dyno settings working together?