The doors limitation is to avoid them from getting ripped of the airframe by the wind...
Of you have a close look, there is only a smalll "nubsy" (as we called it) holding it onto the frame...
The "klick"-you mean the idle stop?
That would be the pin pushed back for 5 seconds when you push the "idle stop release" button on the pitch...you check it before start-push, it klicks once when it releases...then klicks again after 5 seconds when it locks...