thanks for your help! I spoke to the dealer (SupremeSurf) and they told me that this is the wrong screw for the Sky Wing, but they could now identify the right screw and ordered one from Fanatic for me this morning. However, they said I may take a few weeks until they receive the screw from Fanatic.
It would really be a pity if this small screw would keep me out of the water for a few weeks, including my planned holidays! Is there any way we can speed this up? I am in Munich and can come by the Fanatic office to pick up the screw if you have one there in your warehouse...? Any ideas?