I happened to be listening to this unit and wondered how long it had been since I fixed (?) it. Evidently it's been about two and a half years. I don't play it every day, but I play it a lot. What I'm getting at is that the 22c o-ring I put in it is still going strong. I never did find the right idler, but if I have to replace the o-ring every three years it's worth it. Who'd of knowed it?