That is what I am attempting to tell you. The SLU has the ability to operate 2 servos at the same time in a sequence that would cycle 2 gun barrels back and forth as a real dual barreled gun would do.<div> The servo adapter that i explained takes a servo and replaces the rotating gear assembly for the arm and replaces that with a mechanism that has a slide that goes back and forth in a straight line motion.</div><div>this could be hooked up to the gun barrels to cycle the recoil action.</div><div> This is what I understood the description of the SLU to be able to do. If I am mistaken maybe Fireman Tim could explain, but I believe this is correct.</div><div>The SLU is a new stand alone system to run the tanks, like the HL RX18 or an El-Mod system. I dont know how you could operate the gun with just standard HL elctronics in that manner. I dont think it would be possible unless you could isolate the recoil of the RX 18 and use 2 of them at the same time.</div>