Push pull is the best system, though routing cables and getting to both sides is hard. So we all wind up with Push Push, or pull pull, depending on which way you are steering. As OT 57 pointed out, there are many reasons we do not suggest anti feedback systems. Just go back with a good cable system and lube it well with a heavy oil into the jacket before you install the cables. You will get many years out of a well lubricated and maintained cable system. BCB