my sl has work brilliantly for a whole month and 12 days it has just started to work backwards and runs rough, has lost quite a few engagement points (its black btw). I have just sent this back to tarty. i personally didn't bed it in as i was told i didn't have to and i have been through two freewheels both sl's and i don't regret it i feel that the time they do work right are brilliant. Hopefully tarty can fix this with a quick turnover