Gameboy Advance SPi - Raspberry Pi inside a Gameboy

Here's a fully working Raspberry Pi inside a Gameboy Advance SP.
Short video of it from all angles: https://youtu.be/VBCmUc5d7g4

There's more than a few of these projects that put Pis in Gameboys, but I've only seen a couple that used the Advance SP and they both cut all kinds of holes in the case.

I didn’t want to cut any new holes and it had to close up completely; no wires sticking out, no extra buttons in places they’re not meant to be. It had to look as much like a normal Gameboy as possible.
This build doesn’t have any sound.
The backlight button was programmed to be a “lights out” button on mine, and shuts down the Pi so I can turn it off easily.
This isn’t a complete guide, but it should show you enough to figure out how I did this and that.
This was not an easy build.

Parts list:
• Gameboy Advance SP aftermarket case
• Gameboy Advance SP hinges
• Raspberry Pi Zero
• Micro SD card
• Adafruit perma-proto half-sized https://www.adafruit.com/products/1609
• Adafruit Powerboost 500 https://www.adafruit.com/products/1944
• 1000mAh Battery (Dimensions: 5 cm x 3.4 cm x 0.6 cm) http://www.ebay.co.uk/itm/171247223018
• Adafruit PiTFT - 320x240 2.8" TFT+Touchscreen for Raspberry Pi https://www.adafruit.com/products/1601
• GPIO Ribbon Cable (any wire will do but this was thin and flexible) https://www.adafruit.com/products/1988
• Power switch
• 4x4x0.8 SMD tactile push buttons http://www.ebay.co.uk/itm/111726375227
• 4x4x1.5 SMD tactile push buttons http://www.ebay.co.uk/itm/111726375227
• Optional: Gameboy cartridge

Guides are attached
Ask me about anything I forgot to mention, I'm happy to answer