The non welded approach has great advantages over the now common welded unibody styles like Apollo, Carbide and Thor.

Part swapping is the main one. Fixing unibody robots can be a real issue, where as if you just need to undo some bolts and swap a panel its much easier. And you can swap entire weapon systems if need be! Down side is, if you get it wrong, your machine can be picked apart piece by piece.