Those AGM's are really heavy & I didn't want just any ole flimsy battery tray........soooo, I made my own. This one would work in a Sherman tank. All 1/4" aluminum and 3/8" stainless holdown bolts. Just slight overkill.
BTW, did I mention, my biker buddies nicknamed me "overkill" . Hey, I'm just tryin to avoid that ole "Murphy's Law" thingy.