Konstantin's technique how setting electrical insulating cardboard shim for loos

[themaximillyan]

https://www.youtube.com/@Shevedr

• Konstantin say: "I bought a digital torque wrench and started experimenting. I found a few pins in the bass section where the resistance was about 5 pounds per inch on the right and almost zero on the left. I inserted an electrical insulating cardboard shim and tapped it back using a hammer.
  The result was amazing - the resistance became 24 pounds per inch! When I come across a new client's piano with weak or loose pins, I reinforce them using a similar method. I take an electrical insulating cardboard shim - 0.2 mm and cut strips with a width of 21 mm. Then I fold it into a tube, insert it into the hole of a pinblock until it stops, and leave it threaded onto the output of the pin. After hammering, the pin and electrical insulating cardboard shim go into the pinblock together. The resistance after this procedure is very encouraging. I have been experimenting for half a year now and have found it's a cost-effective technique for tighting pin on the bass register. A resistance of 24 pounds per inch is not always achievable in new pianos. Some people may criticize me for imitating the well-known Max Kolesnikoff from Kazakhstan. However, I am confident in my own findings and have chosen to follow Max's footsteps. Max is absolutely against such experiments, especially when it involves hammering a pin. But, this is my practice. What do you think about this, fellow piano technicians?"