[Andrew Schreiber]

Thanks for the reply, id have to measure the pressure that a full mag of balls would exert on that point and the figure the torque on the servo to get an exact value. And since im just a programmer they dont let me do much outside of programming and electrical (kidding). We dont need 360 degrees of rotation and because we jus need to put something (a bar even) in the way to stop the balls falling through. From a purely theoretical standpoint how feasible would it be to stop the weight of one ball from rolling thru an opening using a servo which moved a simple bar into position? Ill work the physics out sometime later today to figure out about how much weight all the balls exert on the bottom ball and then figure out a good way of mouting it.