I changed control method because of someone's suggestion, maybe I shoud revert it.
I couldn't find a way to make Thumbsticks configureable because they are not considered to be button inputs unlike other buttons.
I don't fancy denying someone else their preferred config just to get mine back, maybe give players an option to have control of the helicopter on one thumbstick (left) as before or the new method using two thumbsticks? :)
that's probably the best option. I'll make a patch tomorrow.
