Layers case for Keyboard FeatherWing

This thing is a simple layered case design for Keyboard FeatherWing with Feather M4 Express.

There are 2 designs (STEP file) for LiPo battery and 3 x AAA battery box.

1). For Lipo battery; kfw_bmp_558a.stp
2). For 3 x AAA battery box; bumper-b620a.stp

requirements;

"Keyboard FeatherWing" by Solder Party
https://www.solder.party/docs/keyboard-featherwing/

"Feather M4 Express"
https://www.adafruit.com/product/3857
...I think this thing can be applied to Feather boards other than "Feather M4 Express", but I have not confirmed it.

requirements for bumper-b620a.stp
Bolt&Nut... M3 15mm Bolt&Nut x 4 pairs.
[Optional...A LiPO battery..."063450" or smaller is suitable.]

requirements for kfw_bmp_558a.stp
3 x AAA BatteryBox; A battery box(L:63 x W:37 x H:16mm) with an ON/OFF switch is suitable.
ex). Adafruit PRODUCT ID: 727 "3 x AAA Battery Holder with On/Off Switch and 2-Pin JST"
https://www.adafruit.com/product/727
Bolt&Nut... M3 12mm Bolt&Nut x 4 pairs.

!Warning!!
No consideration is given to charging AAA batteries in the battery box.
Be sure to turn off the switch of the battery box when connecting to a PC via USB.

Please refer to the pictures for how to assemble.