Has anyone gone from a Givi windscreen to a Cal scientific and if so what did you think? I notice the Cal is wider near trhe bottom.
Yes, had both and rode back-to-back trips to compare them. I use a Tall CalSci. Both on a Madstad.
Can be purchased through distribution
Not as quiet or smooth
Has to be purchased directly from CalSci
Available in 4 different heights
Shape and NACA duct make airflow smoother and quieter.
I've also tried the CalSci with the NACA duct taped over. It really does make a difference. I don't have any problem hitting the bike at full lock, but have a Madstad which might make some difference.
///I know other people on this forum had good luck with CalSci, however, it seems that if your luck is not so good you're SOL. Additionally, the finish of the product was never very good either before or after modification, rough edges / saw marks and the like.
Correct: it is that way on purpose. Otherwise it might reflect sunlight into your eyes.
You can easily make it shiny by running a rag with solvent over it a couple of times. Except that according to Jim Lawrence, the owner of CalSci, V-Strom owner, and a guy with something like 350,000 miles on a motorcycle, that's not a good idea.
Optically, the product is flawless: at least the two I have are. Here's an overlay comparison of the two screens OP asked about.