[MrForbes]

We used a little 540 type Banebots motor and 125:1 transmission and 8:1 ratio chain drive to move an arm up and down for RacknRoll in 2007. Worked fine, lasted all season. But we cheated and used a gas spring to help support the arm, so the motor didn't have to work hard. I recall it took less than two seconds to raise the arm.