Thanks for the prompt comments.
The hook shown in the video is one of the first prototypes, abandoned just because it is not applicable with seat at the highest height.
From the tests carried out, there is no problem with wind, except for very strong winds where the use of the bike is not recommended.
The bag remains straight and not swing thanks her magnetic stabilizers (not visible on the bag).
We are working on the web site and on the bag, in order to give you a really good product.
Video it’s just the story of how it was born and a cooming soon.
In a few days the video with full description.
Sorry for double posting, I keep it in mind.