Ok, how many of you often drive your dearly beloved scoot on the rain?
well, I do a lot here in Berlin
now, since I have the windscreen (tall version), this makes me some problems when there is not enough speed for air to remove the raindrops
so, initially I used some very clever small and simple solution that I found at www.louis.de (see first 2 attachments). they are small rubber wiper-rings that one puts on the gloves and use as wipers for the helmet. quite neat solution, but if you have full screen as I have, is bit not so practical.
then I was visiting one of the boat shops and saw something perfect: fully manual, very simple boat wiper!
so, invested 27 EUR for it (you can get them in the boat's equipment shops or via eBay), drilled the 12 mm dia hole in the windscreen, bit of tweaking and in cca 15 minutes job was done (see the rest of the photos)
even today I got some rain here in Berlin and had opportunity to test it: it works, but needs some more tuning. the windscreen has heavy double curvature surface (stabilisation for vibrating and aerodynamical reasons) so this stiff flat wiper blade does not cover full surface correctly
will try to find some Bosch Aero Twin (or similar) blade and try to install it