So, as long as you tighten the nut securely, the link stays put? That seems miraculous because nuts loosen due to vibrations and torque and the chain gets alot of that. The one I'm looking at doesn't appear to have a locknut.

I used to secure my toe clips to the pedals with a standard screw and nut, made for the purpose of securing a toe clip but with just a standard nut. One or two of them used to loosen alot. I seem to remember even losing one while riding. That's when I went and got 2 new sets w/locking nuts. They now stay tight until I remove them. I suppose that's a more direct, different type of pressure than the one on a chain though.

Maybe I'm overthinking it. I tend to do that alot.

Wabi Cycles has a Super Toughness online for $90, by the way. Yikes!