Well I ordered all the metal I could from HR. Not knowing I had, my wife tried 2 surprising me by ordering another set off Ebay.... Guess I will at least have 2 sets to see which ones I like best! And I had also thought about the weight issue. I added as much metal as I could to my m41. Get alot of flex up front, no issues yet. With the Abrams extra space up front, I plan on making a metal hull insert to fit in the front 2/3s of the tank, and a couple braces as well. I got a good sheet metal guy, and I'm a welder by trade, so it'll take some time, but I should be able to make it work. Plan on filling any gaps with epoxy, and keeping my fingers crossed.