Hi Alan and Steve,
thank to you both for replying and all the suggestions!
I am really getting addicted to the instrument. I have the feeling that my Yamaha P37D stabilized.
Also i am building wooden box for the Yamaha. It is easy to take the keys with the closed chamber
out. I made already process and I am very exited about the sound with the wooden body.
The challenge is to keep the sharp sound alive!
Anyway, just happy to share it here.
When i finished I will drop a picture.