Dude!! I've used Union contacts for years, stomped huge jumps on em and even beat the crap out of my rig in spring conditions. I've briken every part of a binding except two in 14 plus years of riding, baseplates and discs. Whatever you're doing not using the washers, using lock-tite, or a power screw driver. I've worked in a shop for a few years too and never seen a broken disc, not once. Pictures would help to see what's going on.