Broken Blue Bird servo?
 

Is something wrong with my new and unused Blue Bird 620? When I had one bb 620 in my TLT it totally bogged down my Truck digital ESC to the point that the engine stalled and the ESC stopped responding, as soon as the servo wasn't under load everything worked great. I then removed the bb and put in 2 Hitec 645 mgs and now it work as a dream. Call me crazy but one bb 620 shouldn't draw more amps then 2 Hitec 645s right?