Some people do that but I was after height alone, not any special airflow properties of the visor. If I could have gotten a windshield that was 3" taller than what was available that is what I would have bought instead of the shorter windshield (shorter than the final height of the Calsci +6 and visor together) and the visor. With the visor in place and full up, and the windshield full up, I still look over the top of the visor; I seem to sit kind of tall in the saddle.
I think the air stream coming off of the MRA visor is cleaner than either the stock windshield or the taller Calsci though. There is no buffeting from the top of the MRA visor at all. I also think the air coming off the top of the visor has more of an 'up' flow to its direction but that is much more of an opinion than any kind of quantifiable factor.
MRA also makes a complete windshield / visor package that at least some people on the old forum used and liked. I do not remember how tall that combination was though.
If you do 'try' an MRA visor you will want to be aware that you will have to drill four holes in whatever windshield you use with it. The MRA visor uses small plastic stress spreading strips and screws to mount. No way around it that I know of either.
Brian
Wow, I was assuming the norm would be adding a spoiler to a stock shield as opposed to buying a new taller and then adding one to that.
Does adding the spoiler add protection inch for inch as compared to a new shield at the same height? Or does the spoiler create more block because of the position/angle of its placement?