Using a linear shooting system what would be the best way to drive those motors? By looking at Andymark I noticed the Double Doozy assembly
http://www.andymark.com/product-p/am-0629.htm for the AM 9015 motors and then the
http://www.andymark.com/product-p/am-0449.htm gearbox. From what i've roughly calculated that would give around a 2,000 rpm output. Would this be enough to launch a frisbee a reasonable distance?