>>11385283>Ah i didnt know they were the same system.they are the same "block 2" joint structures but they might not be the actual same shape in terms of limb lengths, thigh widths etc. the puni mofus are block 2-S and the buster dolls are block 2-M. so you probably can't replace just say the upper thigh without changing out the whole leg but I'm not sure of all the differences.
there is definitely some compatibility though, for example this miku kitbash is a mao with buster doll knight's torso & skirt with mao's arms, legs and head.