Genie chain drive that was 13 years old passed away the other day. Had a lift master with belt drive installed. Included new motor, sensors, rail , outside key pad,inside key pad and two remotes for the cars. Was considering doing it myself so I sat down until the urge passed. Everything is expensive here in New Jersey. The bill was $700.00. I'm trying to tell myself that the cost amortized over the expected life span of the unit (15 years) or so isn't so bad. I can tell you that the belt drive is 200% quieter then the chain drive.