Wayne, I'm pretty sure that, as mentioned in an earlier post, only the rotating retracts have the bell crank system. I have, along with two other fliers have been flying the Hangar 9 Corsair for about two years and the only problems encountered were weak struts, which was remedied by replacing with a heavier wire, and the original ball links were too small and would pop off, this was fixed with heavier links. I have not heard of any way to, or need to try to counterbalance gear, a good retract servo whould be able to handle the load with no problem. Cliff