Well, I tried to solve the leak problem of my Yamaha Pianica 32A. The leak was not much, but we always want our melodies working perfectly, don’t we?
So I decided to replace the original gaskets (which were not really in good condition) by adhesive-backed stripping with 2mm, which are thicker than the originals. Unfortunately, however, the leak got much worse with them. What could it be? The thickness? The different material of the gaskets? By the way, what would this material be? Attach pictures maybe you can help me. The first picture shows how it was originally. The second picture, how it is now. The third is an approximate photo of the gasket material.