Hello to all. Great site with lots of information. I have a quick question. I need night driving lens for riding my motorcycle. I'm looking at the Ballistic M frames military issue 2.0 frames. Reason I chhose this is mainly cost and availability on DA BAY. haha cheap Charley but hey ONLY for night driving. My question is if it is possible to interchange the different lens types (Array, Heater, Sweep...) on this one frame? AND, of all tyhe designs which is the largest frame for my big melon? Thanks in advance and good day to all.