OK thanks guys. Yeah I don't know how it breaks but I've broken 7 of them. First it cracks then part of the plastic breaks off, at which point the forward pressure needs tightened a little (but boot still has a little play), then the whole back part of that piece (including the forward pressure mechanism) falls off and they're totally unusable. I've never seen this happen to anyone else's but saw this for sale thread on TGR with some cracked pieces:
Crack:
http://i249.photobucket.com/albums/gg216/jdfische/6heel.jpg
Part of plastic broken off:
http://i249.photobucket.com/albums/gg216/jdfische/5heel.jpg
I love the bindings and my shop hooks me up with replacement baseplates and brakes when I break them but they're a real pain in the ass to unmount, dismantle, swap, reassemble and remount when parts break. If the new ones were metal I would try to get hold of those baseplates but seems they're plastic too. So I'll be swapping to Peak 15 next winter and should still be able to sell my FKS with new baseplates for a decent price.