Sure, but as the frame is shipped (already 4 weeks ago) I have to pay anyway. As written: if only I would have foun this thread earlier...
DPD dropped a parcel today :-) in fact there was a bag with some hardware, including what I ordered, cable guides for the frame holes but no extra seat clamp or whatever. So I'll approach Wing to order some more spare parts.
In general the frame looks really good. I quickly installed the headset (not finally, just dry) and the fork sits with minimal gap in the frame still turning freely, the crown race went smoothly onto the steerer, seat post matches tightly... nothing to complain so far!