With pleasure we announce that the OSAT documentation for FreeRider bicycle trailer is available online here: https://thewalkaways.wordpress.com/freerider-diy-documentation/
This documentation and its all future versions will always be available freely, under CC-BY-SA licence.
We are right now preparing first series of open workshops, teaching people how to build such trailers. First edition is planned in December 2018 in Zagreb, Croatia (stand by for announcement). Later we plan to arrange a series of workshops in the Balkans.
Talk to us, if you want to participate.