Logitech G25 Additional Buttons with Quick Release and Magnetic Shifters

Logitech G25 Additional Buttons with Quick Release and Magnetic Shifters.
For this project you need:
10x 12 mm Buttons
4x M4 12mm bolts and nuts
30x M2 10 mm Screws
1x Arduino Pro Micro ATmega32u4 5V 16MHz
1x Spiral Coiled Usb - Micro Usb Cable

For Shifters:
4x Neodymium magnets 6x2 mm
2x Micro lever switch
4 x M3 30 mm bolts and nuts
4 x M3 25 mm bolts and nuts
4 x M3 10 mm bolts and nuts

For original G25 buttons:
2x 2 mm 2 pin female connector - WB-02 (MW-2M) Connfly

For