Metal pushrod, think about 1/8" or so outer diam, z bend at the servo end and a threaded nylon link at the other. But I mean shouldnt the GP engineering have caught that?? Those tubes are glued in there now, the pushrods are bent in place, cant really take em out w/ out cutting them and replacing the pushrods. Its just driving me off the wall, im soo close to getting this thing finally done and something else to try and figure a way out.