Would it be possible to have the controller lock to a control once you press the trigger? So I can aim at a control which turns it green, the press the trigger or grip buttons or something to lock the object so that I don't have to keep the controller aimed while turning the knob? I find that I'm often needing to look somewhere else, like at the numbers being changed, instead of at the knob, and my hand will move slightly so the knob is no longer highlighted green which causes the numbers to stop changing.
I think it would be a great improvement to the interface in VR.