Mobile Piano Keys

[molto-marcato]

Hi,

this is my first post in this forum. Please excuse my english, which might not be immaculate

I was wondering about two things recently.....

In the movie about the brazilian piano-legend Joao Martins i saw him use a mobile, silent piano board with keys that behave like ordinary keys on a grand, so he could practice silent wherever and whenever he wanted. Does anybody know, if and where one could buy something like that?

Second thing is i live in a appartment block and own an accoustic piano (Yamaha U1), which i love very much but my neighbours don't. In the late evening and especially when practicing repetetive elements i use the silencer pedal, without changing my playing behaviour. So if the score says fortissimo i play fortissimo, thus pressing the hammers real hard against the damper. Can this extensive useage of the damper do any harm to my piano?

Thanks and regards