The concept below gives us the opportunity to slowly accelerate the ball by having a series of rollers that get progressively faster. The key would be trying to keep it as light weight as possible. # 25 chain, or even polyurethane banding with rollers might be used for gearing. *** The information in this email is confidential and intended solely for the individual or entity to whom it is addressed. If you have received this email in error please notify the sender by return e-mail, delete this email, and refrain from any disclosure or action based on the information. ****