Mine runs of a Hitec 645 MG. Its got adequate torque to deploy while on final. The speed brake won't go all the way to 90 degrees. I think mine goes somewhere around 70 or so. If you use the linkage to its limit, you'll have trouble getting the brake to lay flat without binding the servo arm. I'd run out and check for you, but I've got it packed up and ready to roll off to the High River jet rally tomorrow. [8D]

Kelly