Michael Chidester is the a long-time researcher and practitioner of historical martial arts, and the Director of Wiktenauer. He is also producing draw-droppingly gorgeous facsimiles, here: https://www.indiegogo.com/projects/manuscript-facsimile-fior-di-battaglia/x/1789830#/ There were some unfortunate technical problems with the recording of this interview, so you may wish to refer to the transcription below.