Actually, I have a huge amount of original info on the Model 201, including - as I recall - drawings and data on some seven different variants. I reviewed these variants in a talk I gave at the Columbus, OH IPMS/USA Nationals a few years back. I am not posting or publishing any of this information as it is for a book that is currently in research/production (ie doing the drawings, layout, etc.).
Assuming I live that long and you can wait a couple more years I don't think you'll be disappointed.