Received and added a 15" MadStad replacement shield (with rounded bottom with no "MADSTAD" branding). The original 13" shield had the wrong hole patterns drilled in it so MadStad told me to drill 2 extra holes in it, run it and get back to them.
I noticed the 15" MadStad works better all the way down than what the 13" did all the way up.
The wife seems to be satisfied with the passenger's wind performance of the 15" (all they way up).