8BitDo Ultimate BT: Gyro input over 2.4Ghz guide

After a bit of searching and help, I found out how to use my 8BitDo Ultimate Pro Bluetooth/2.4Ghz controller in 2.4GHz mode in the Switch mode, including with full gyro support. Note: there are two firmware versions, one for the controller and one for the receiver. This is only possible with a specific version of the receiver...