Nice photo of your 305 and S1000. Thinking a bit more about my S1000, I believe it had been previously fit to another model bike before I bought it because the inner flange edges had crescent shapes ground from them, probably to clear wider exhaust pipes than those of the 305, and I think it came without a windshield, too. I was working my way through school part time in a machine shop on the Ohio State Campus where we made research equipment, so I had access to 1/8" plexiglas and a hot air gun; I believe it took two tries to mold one over a bowed sheet of stainless steel without making air bubbles from too much heat - I didn't know about the hot oil method you used. This faring also has a small brace rod across the top between the outermost windshield mounting holes - I don't know if this was stock but I am sure it came with it, and I think I made or adapted the mounting brackets for the 305 in the research machine shop in 1967. Until recently I had no idea my fairing was actually developed on an example the bike for which I bought it.
I just visited your anniversary page and took note of the Studebaker in the photo. Yours? My first ever car was a similar 53 Studebaker Comander Starliner coupe' which was my other transportation through my years in college. BTW, my 60s riding gear included a pair of "engineer's boots" into which I would tuck my jeans and if I was caught in the rain, water would collect along the back edge of the inner flange of the fairing and blow back on my knees and run down into the boots; it was not unusual to have to dump a pint of water out the boots when I got home and I never did figure a way to avoid it short of a full rain suit that I didn't have.