Maybe try to wrap the screw threads with teflon tape? I heard it works really well against screws coming loose on normal boards/bindings...give it a shot on RC tech NS boards...just a suggestion.
Thats what I thought when I read this thread. I skip loctite, why bother and go straight for the plumber's tape. This happens on most of my boards after 20-50 days or so. Always on the front foot binding. I always use the teflon and it either eliminates or slows down the loosening of the bolts.
I checked the screws on my bindings today after a total of about 10 hours on it. I was able to tighten most of the screws by about 1/4 of a turn. Nothing that I wouldn't expect out of any board. The screws were still plenty tight.