Is replacing them an option? The old ones can be spun off and new ones spun on quickly. Even if you only have a few to replace, you could use some which don't match and replace the set later; install the odd ones at the extremes and replace those in the center (if that's where they are). There have been a few sets which were more worn in the center on the action. I spun them off and swapped them with the ones at the extremes. It's a good way to extend the service life of a set. I like to use the check-holding tool mounted in a hand-cranked drill. It is more controllable than an electric drill. Use a belt sander to reduce the checkering and improve the arc of the tails to prevent further deterioration. I don't checker the tails any more for two reasons: rapid leather wear and louder check-in noise. If there is a problem checking, more than likely it's the fault of the condition of the leather than the tail. Tails can become slick but extreme roughing has it's drawbacks. The old dried leather should be replaced. Backchecks are one of the most neglected aspects in regards to leather condition. But if your going to replace only a few leather covers, use thick CA and plan on replacing the set down the line. Regards, Jon Page
This PTG archive page provided courtesy of Moy Piano Service, LLC