>>415422460
Hmm, can't say exactly like that - but twsit bones in they're idea is something like "Anchor" that smoothers bones rotation, i think if you make some "twist bones"(kinda) for ass, like the one model creators make for joggle physics, and use twist bones method on it - should work same, will only require some trial and error with weightpant(as always with that part modeling).
Can't say for 100% it's gonna be 1 to 1 thou, never saw people doing it that way.