Originally Posted by volantaddict
This is only a problem (it's not the wormscrew but the aluminum track which gets stripped) when the forward pressure is set with the boot in the binding (i.e. by doing it wrong). The track is made for moving the heel of the binding forward, not compressing the FW pressure spring against the resistance of the boot. You can also destroy them by hitting them with a hammer.
I have never had problem one with my CR 614 TDs (which are mechanically the same binding as the Race 614s), and they are on the skis I use for skiing chicken heads and coral reef.
Likewise, I've used R-614s for several years with no problems. I even remounted them on my new Watea 101s a couple years back. They are on the heavy side, but I like the easy forward/back position adjustabiltiy. Got to try my Wateas on, forward, and behind center to see where they skied best.
If you adjust the forward pressure with the boot in the binding you will screw them up, after which they are pretty much toast, so buying used 412s or 614s is a gamble. Got the 412s on my R:EXs and move them forward for the day with a flick of the switch when I go to Telluride to make them better bump skis.
The bottom line (as always) is that if you know your equipment and take care of it, it will take care of you.