A standard factory fitted sunroof (OE), has a winding handle that when operated, drops the panel down a few cms, and then retracts backwards on runners, in between the headlineing, and the roof itself.. the roof panel on a car that is fitted with a O/E sunroof, is a completely different panel to one that is not fitted with a sunroof.. ie, if you wanted to fit a factory sunroof to your car , you cant! You hve 3 options.. 1, you bodge your existing sunroof. 2, you fit a larger aftermarket sunroof (best option) 3, you cut off your entire roof! and locate another Golf that has a O/E roof panel... and that really is more trouble than its worth!
Tom
RJ, sorry to go over what you just said, I just thought id try and explain from a different angle..