Connect windows Xbox 360 controller (i have wireless white version)
Go into options and ensure default scheme is enabled.
Go into editor, place any chopper. Fly around, try and fire and aim. Notice rudder and fire bound to same axis.
Notice freelook and manual fire set to same button.
Go into control scheme. Disable default scheme. Setup custom scheme. Exit and restart arms. Go into editor and try and fly chopper again. Notice controls don't work. You need to go back to control scheme and hit ok. New control scheme should be enabled by default.