been using the Pi-Boy on and off for the last couple of months - works beautifully :-)

some things need to be redone though;

- messed up front panel (heat-setting M3-thread *after* painting was a dumb idea...)

- the power button needs a redesign (button-cap is missing)

- have to add a bit material to the back/front to close the slight gap between the two

on a side note: what turned out really well where the ABXY buttons - the combination of the soft-tactile omron switches plus a coat of epoxy feels just right while playing :-D

the way i build them was:

- print the button-piece (one part, all four are connected by a bridge - to ease assembly) with the letters indented

- fill the letters with acrylic paint

- put a drop of XTC-3D (some other epoxy might work too) on top to form a slight dome