It would seem the stock height Clearview may be too tall for you at 5'3" (even with the vent). I'm 5'9", and my Interstate Clearviews (no vents) are stock 15.5" on one with a Bigboy seat, and one inch under stock 14.5" on a Lowboy (and those are optimal for me).
Optimal shield height is at your nose while sitting comfortably, neither at attention nor slouched.
Helmet type can also help, if you're not married to a full face for safety (not that there's anything wrong with that).
At 100, I'm in a car or my house with the AC on.
Sorry, I edited my post for clarification. I know the stock height windshield is too tall for me and I will be cutting it down to the proper height. My question is about the shorter sport windshield that clearview sells for more air flow.