Thank you Jan for opening this topic.
About maintenance, it is recommanded to rince it and put some wd40 from time to time. And of course beware of sand.
Note that it is easy to take appart for maintenance and that parts are sold separatly if needed.
Thomas Goyard has been using one of the first prototypes for I think 3 years now and also it was still working I replaced the hook in september.
A2 has been using it a lot also and was using it at the Fort Boyard challenge (he won..).
Nicolas Goyard was a big fan of it from the start and was kind enough to send me this short video where he goes flying at 35 kts.
I am sorry that my website doesn't handle english but there is a user's guide in English here:
jimdo-storage.global.ssl.fastly.net/file/dc26ce47-5f2c-4de1-905a-3cb45a15f7c5/Mode%20OP%20(En)%20Free-Fall_colosse%2023.pdf
Feel free to contact me for export outside of UE ( taxfree ) or any question.