I'd like to research Direct Tune & Master Tune. can someone give me info on these products. I'd like to compare them with PCIII. can a dyno be used to set them up? I don't plan on doing any more mods w/ my bagger. I've gotten some good feedback on my last post about the 05 FLHTCI. now I'd like to narrow down which tunning system to use & get the best bang for the buck.