Chopper repair nerf: Have pilots have to grab the controls in order to use their thumbsticks (or triggers) to pilot the helicopters. This will mean that they can't change course while holding something, repairing, or shooting. They'll have to let go and grab the controls with at least one hand to adjust course. This also means you won't waste flares or start shooting when repairing in the chopper. (In order to use a thumbstick or trigger, only that hand has to be grabbing the controls, but you can't use both hands to pilot the heli when only one hand is holding the controls.) A good example of this mechanic being used is in IRON REBELLION, the VR mech game.