Good luck at that site! I bet you will find some good stuff, but dont discount them old timers with them old machines, some of them know and knew how to use them very well. There are plenty of good finds left at that breastwork though I betcha and that F75 is a hound dawg for that type of stuff! Be sure and post up pics of your finds and if you get a chance post some of your Dad's friend's finds if you get a chance, those carved up bullets tell a story for sure.