I called Windvest today and spoke to Doug the owner, who said he did not recommend using it. Said it would be too tight a fit (as Greg says).
I mentioned the rubbing issue on the inside bottom of the screen, and he suggested putting a piece of weatherstripping there. He said he should consider including a pre-cut piece of weatherstripping with his windshields. I agreed that would be a good idea
I told him I was pleased with my 10" because I like some wind, but said I should probably really be using a 12", and that I may buy one to try on long trips. He told me about the new 13" they came out with, but I said I wished they had an 11" model, because I would buy one for sure.
He encouraged me, and anyone else who was like-minded, to email him with our wishes, because if he gets enough requests, he may just start producing them.
Doug seems to be a really good guy.