Loose tuning pins make a piano untunable and must be addressed. Of course, a nice, new pinblock would be the best solution, but in many instances, this is not an option because of the high cost, and it may be totally unnecessary! If only one or two pins are loose, the piano can usually be saved by either replacing the loose pin with an oversized pin or by adding a shim. In this video, Jim shows how to correctly cut a shim to the correct size and shape needed to restore the tuning pinhole and make the piano tunable again. When done correctly, shimming will work well. It has been successfully done in keyboard instruments for hundreds of years.

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