Don't take this the wrong way because I'm not trying to be a wise-ass, but the proof is in the pudding.
If someone can make homemade clear glass that's better quality than Gordon's, I'll believe it when I see it. :^)
A lot of things are possible in theory, but that doesn't mean that they'll become a reality.
Theories and words usually don't impress me too much. What gets my attention are results.
My machine shop instructor always used to tell us, "don't tell me how good of a machinist you are... show me". I always thought that was a great philosophy and it's stuck with me ever since.
If anyone can make Grade A fiberglass in their garage, I'll be the first in line to pat them on the back and tell them "great job". That would be quite an accomplishment.
There's short mention of the process in Fred Bear's biography (along with a small picture).
The picture shows what must be a rack of 100 spools (or more) of fiberglass yarn being fed through a long line of different processes.
It mentions that 250,000 parallel strands of filament are drawn though a tank of plastic resins, and then into metal channels, and then oven cured. I assume this is all done under a certain amount of controlled tension, but they made no mention of that.
Just from that small picture and vague description, the process looks to me like something the average person isn't going to be capable of accomplishing in their garage.
Someone please prove me wrong though. I'd love to put my foot in my mouth on this one.
I'll even buy your first batch of clear fiberglass, but only if it's Grade A and better quality than Gordon's. :^)