I had intended to post this with Tony T's B-25J build, but decided to put it here so as to not piggyback his thread. I found this site just now and thought it might be better to post it as a new topic so that more of you would see it and be able to use it for your modeling projects. Some good reference material here. Enjoy!
Mike
http://www.liberatorcrew.com/AircraftGunnery.htm