The history of the glider is better written by others and their findings are contained within several articles, which I have made available on this page, but in the meantime a couple of snippets of information not mentioned on the drawing:
The spoilers could operate independently of each other and by using a single spoiler with ailerons and rudder the Zanonia could pull an extremely tight turn.
Documented in the Bungee Cord rebuild article is the addition of several pounds of lead in each wing to increase the gliders airspeed. Look out for the photo in the article.
Above 2 photos of the construction are from Aerosente
First set are present day photos from the National Soaring Museum at Elmira
Second set are photos taken by Hans Groenhoff a celebrated aviation photographer and brother to Günter Groenhoff who is famous for flying the Fafnir glider
Third set were photos taken by Fred Loomis, a local Elmira, NY, photographer. Loomis spent the week at the hill, took photos of everyone and everything, developed the film and sold postcards from his Tent to the many visitors a few hours later. This was his summer income and entertainment.
Full restoration images below
With Thanks for
Documentation from: Soaring Magazine / Martin Simons / Bungee Cord Magazine