Concertina v0.7.0 bookend subassembly

Subject image

The right-hand bookend of a prototype for the v0.7.0 Concertina, with 2 mm cork glued to the inside to dampen sound, a pushbutton braced by three small pieces of plywood, and a USB port soldered to an internal pigtail cable. For a more comprehensive picture of similar lining for sound, see Concertina v0.6.0 cork lining.