"Fairkehr" (AKA fair traffic), magazine of alternative german traffic organization VCD features an article by Valeska Zepp about the Velowerft project of NGO Bonn im Wandel (german language only): https://www.fairkehr-magazin.de/aktuelle-ausgabe-22019/service/lastenrad-selbst-bauen/

If you are interested in hosting a similar project, please get in touch.