[Chris Hibner]

Are you running your upper wheels and lower wheels at the same speed? If so, I would recommend running the upper wheels much slower than the lower wheels. If the two sets of wheels have the same linear speed, the ball will exit with no spin. That creates a lot of aerodynamic buffeting on the ball resulting in an erratic trajectory. Knuckle-ball pitchers have been using that to their advantage for years since erratic ball flight is great for fooling batters. However, erratic ball flight is not good for shooting baskets consitently.

A hooded shooter is easy to make, but it takes more than double the speed of a shooter with wheels on both sides of the ball.