Hi Richard, not at all. When Kristian design/construct the Geometry of the Linkage he just needs to make the moving Arm the exact lenght that matches: fully retracted=Doors closed and fully extended=Doors open or visa versa. Of course it requires a bit of measuring and perhaps trial/error. But definately possible without trouble and then you avoid the hassle of external Switches. I looked at the wiring diagram briefly and should be possible to use the OE Light Switch and no modification to the Harness apart from shorting the set of wires on both OE limit Switches. But that has to be verified.
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