Step 1. Print the box.
Step 2. Mount the knurl nuts in place using a solder iron. Make it hot and let it melt into the correct position.
Step 3 (optional). If you want to make the box nice spend some time to sand and plaster it smooth before applying paint.
Step 4. Glue magnets to box and supports. I use CA-glue with accelerator
Step 5. Insert a USB cable through the center hole of the box and solder to the BU0836. I use a rubber grommet to reduce dirt coming into the box.
Step 6. Solder USB cable to BU0836.
Step 7. Solder the BU0836 cards.
Step 8. Attach controls; joystick gimbal, switches and pots to the lid.
Step 9. Solder cables to the controls, twist them to reduce interference and make sure they are longer then you need.
Step 10. Trim cables with some extra cm to spare if the BU0836 is on the center bottom of the box.
Step 11. Solder controls to the BU0836 cards.
Step 12. Position BU0826 card in the bottom center of the box and pull on the USB cable so you have a few cm spare cm inside the box and attach the zip tie between the BU0826 and rubber grommet where it'll work as a strain relief.
Step 13. Hot glue the BU0836 cards (two dabs on either side so it is easy to detach if necessary).
Step 14. Use M3 screws and attach lid to box.
Step 15. Setup as a standrad joystick inthe simulator of your choice! :)