Order the Lipo battery, EDF fan, ESC, servo tester if you also want to test the EDF before your controlling circuit is ready. Maybe also a lipo battery tester so you can double check if your circuit works as intended. Don't forget to order Lipo charger, XT 60 or XT 90 adapters (male and female), so you don't have to order other things in a separate order after you received all the things, and notice you have missed something! (as I did)

I did not do this step, but it is really recommended to reduce noise and improve performances and battery duration.

https://www.rcgroups.com/forums/showthread.php?1267814-How-to-dynamically-balance-EDF-unit-with-a-cell-phone

Download the 3d STL files. They have been printed on a Zortrax M200, but any filament machine should work.

Order Arduino Micro, cables, connectors, resistors, joystic, LCD, all you need. Always double check.

For the battery tester part of the circuit, you can find more details on this page:

https://www.instructables.com/id/1S-6S-Battery-Voltage-Monitor-ROS/

Cut hole for dirty air to enter into the VAT (V1) or Plexiglass tube (V2).

You can easily remove bristles from a cheap long brush. Then mount them with hot glue.

For reference look here:  https://skfb.ly/6MOZD