Tight tolerances and stress-bearing knuckles or not, a couple of people have complained about bolts loosening and even strecthing (I have no idea how level managed to find such craptastic bolts, must have custom ordered them... the 3c bolts in the hardware store are better...)
The knuckles are not press fit like a sq taper crank so they don't really take over the stress, and 3 bolts are fewer than 6. The system is obviously plenty strong but not bombproof. IMHO 6 bolt is bombproof. Tighten all 6 with a regular multitool and done. There's just no way you'll generate enough torque to **** with 6 M5 bolts, not even with skidding and all that.

BTW, it's nice that they have a version w/ ss threads now. :thumbs up:

Again, it's a solid system solidly overpriced.