The Keybed is a TP40WOOD bought separately. There is no after-touch strip.
It is cased in a low profile beech "box" of my design with a conventional hinged piano lid. I am using solid beech end cheeks, beech faced mdf for the base, the back and internal structure are 3/4" ply and the hinged lid and front are solid beech. There are more minor parts in beech faced mdf. Most of the construction is glued. It is very strong and heavy and over-engineered!
The box is supported on a tubular metal frame with mdf end panels.
The mdf is about 20mm thick.
Unfortunately (for me) the case has no room to isolate the key bed for a less rigid mounting. I could of course use a metal plate for the base if this was necessary.
I will carry out your suggestions tomorrow.
I can see already that it would be better to mount the keybed on floating rubber mounts. My base is acting as a sound board.
How is the keybed mounted in the NUMA? Is there any isolation?
I am assuming that your keyboard is a NUMA. Your video gives the impression that the key noise is fairly quiet.
I should also point out that all 88 keys are noisy. If anything the black keys are worse than the white. More noise is generated when releasing the keys than by pressing the keys.
Thanks for your suggestions.
Robin