How fast does one of the v-slot belt driven actuators move? I would like to use one to throw a tennis ball. Basically the ball is dropped into a holster mounted on the gantry plate then the plate is accelerated to the end of the rail where the gantry stops and the ball keeps going. I'm thinking that the longer the rail, the more time the gantry will have to accelerate and decelerate. Assuming I went with the 1000mm or 15000mm rail, how fast could the gantry move?