Glad I found this thread.
I have 11-12 390 Bosses and have been having a number of the same issues, particulary the high-back screw coming loose and the ratchets not engaging.
Has there been any fix to the high-back screw issue? It doesn't send my outta control but I can absolutely feel when one of the highback adjusters slips loose. Plus, I'm pretty sure if you get snow/water in their on a cold day the stuff freezes and I have to put breath on it to get it to come loose enough so I can slide it back to where I want it.
When the ratchets don't engate its EXTREMELY annoying and I've found I also have to blow on these as well and then they work better.
I like these bindings (love the customization options) but it seems to me all these "working" parts make the bindings more prone to error.
Come on Rome! Whats going on???