Some tools should be retired from the piano technicians arsenal, I cite the key bushing tightener because it is a destructive tool which only achieves its intended result by a brute-force, severely inelegant method. You make inconsistent work for yourself, and you make future key-bushing replacement more frustrating for the next tech who deals with the board. You can replace felts until the cows come home, but it's really hard to achieve consistency on key mortises that have been bashed in by this tool, splintering and deforming the wood in the process.
VS Pro-felt (by PianoTek) can revive keyushings if they're not too far gone (read: threadbare). But getting into bushing work requires specialized tools and experience and you may be better off having a piano tech do the bushings for you, or better yet, replace the lot and give your piano a guaranteed few more decades of bushing-worry-free operation. A piano tech will have a good set of sized bushing cauls (not the spring loaded type) and heat-treating cauls to make each bushing extremely consistent one to the next.
Also, you showed a photo of a key with an out-sized balance hole. This takes some finesse to fix properly. The old style phenolic inserts are not available anymore, although you may be lucky to find a tech with some left overs plus the special installation drill-bit. However, this isn't the best approach as they can add noise to your keyboard. Ideally you outsize the hole, plug it with hardwood and re-drill. Locating the new hole needs to be very precise. If you're lucky the original holes can be salvaged (I can't tell from the photo), I like to use Chair-Doctor glue to tighten and then a key-bushing reaming tool to widen to the correct size. Again, you may want to consult a piano tech to help you with this process or give you guidance.
BAH. Not fun work. Good luck!
VS Pro-felt (by PianoTek) can revive keyushings if they're not too far gone (read: threadbare). But getting into bushing work requires specialized tools and experience and you may be better off having a piano tech do the bushings for you, or better yet, replace the lot and give your piano a guaranteed few more decades of bushing-worry-free operation. A piano tech will have a good set of sized bushing cauls (not the spring loaded type) and heat-treating cauls to make each bushing extremely consistent one to the next.
Also, you showed a photo of a key with an out-sized balance hole. This takes some finesse to fix properly. The old style phenolic inserts are not available anymore, although you may be lucky to find a tech with some left overs plus the special installation drill-bit. However, this isn't the best approach as they can add noise to your keyboard. Ideally you outsize the hole, plug it with hardwood and re-drill. Locating the new hole needs to be very precise. If you're lucky the original holes can be salvaged (I can't tell from the photo), I like to use Chair-Doctor glue to tighten and then a key-bushing reaming tool to widen to the correct size. Again, you may want to consult a piano tech to help you with this process or give you guidance.
BAH. Not fun work. Good luck!