>>7873367It's not mine, but they use a custom linkage system for each part.
The legs will be on long locking rails (at the shin) with Overload presumably containing the knees. Those should be pretty solid as they'll be forced together by gravity, and the rails have what appear to be slots for some very beefy locking tabs.
The arms use a CW-like system, but the rotational joint is contained in the female side on the combined torso to make the male peg smaller and more manageable unlike the CW pegs that basically took up the entire torso. They also link at the elbow, not the shoulder. Only the guys with factory leaks have this linkage in hand right now, but from the few videos it seemed solid enough.
The three torso bots will be held together entirely by proprietary linkages, presumably multiple per part, which we haven't seen much of yet.
The only linkage I have in hand is his left forearm -> left hand, and despite being utterly tiny (8mm square) it holds together insanely well. It borders on needing a tool to separate it.
The bigger concern IMO is if the individual joints of the figures can support the weight. His wrist is already a bit floppy, and the elbow ratchet only barely supports the weight of the arm if you hold it by it.