Towards the Open Piano(ide)

For a quite a while now I had this lose and vague idea of
a minimalist quiet open source "Pianoid" electro-accoustic tabletop keyboard instrument :
silent / quiet, with contact mics or magnetic pickups
small, lightweight, portable
simplest action possible (Viennese mechanism or perhaps something simpler)
simple sustainable materials:
all parts lasercut wood and lasercut steel (if required), no 3D printing required
easy and fast assembly, no crafty tooling or workshop required
low cost to "no budget"
4-5 octaves
no built in preamp
easy to tune and maintain
desired sonic properties:
silent / quiet
strong dynamic timbre variation
reverberant sustain option (pedal or lever, mechanical springs, etc.)
"deep" evolving single note sound
but lacking any crafty skills and tools and workspace, I had no idea how to initiate such a project.
Further thinking about the details and the inspiration I got from various sources lead back to the roots and to the much simpler concept of the HaptiClavier.