Goal of the build is minimal case modifications and repairability. So no glue gun. Screws will be used for everything.
BW 3.5" composite screen
Generic button pcb
Teensy LC
Banggood PSU
Sabrent USB Audio
Gear Head USB 2.0 hub
Adafruit mono amp
Adafruit speaker
2500mah battery
and 3d printed parts for mounts
Things to do:
-wire shoulder/trigger buttons.
-sand and paint battery cover
-fine tune audio
-add a glass screen
Pics:


Custom rear buttons:



Splash screen:
