Hey gang! any of you have a pricing formula for nelson studs.i just purchased a nelson stud gun and an Arco 1200 inverter...i can blast out 5/8 studs now..for concrete decks, beam bolts,whatever... what is a "piece work price"if you know of one..i know i can just stay time and material and add the equipment as gear rental, but i am reaching out to those that may know another way..of billing that is...