Gameboy Advance SP custom shell L & R buttons upgrade

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You'll need a few parts to add the L and R buttons to your custom Advance SP shell. The original design can be found at the link below. To get started, you'll require a spring that's compatible with the buttons. I used a spring from a ballpoint pen, but if it's too long, simply cut it in half. You'll also need two M3x20mm screws to secure everything in place. The original design can be found at: https://pinshape.com/items/55438-3d-printed-gameboy-advance-sp-custom-shell