I have the full size as well, but didn't notice a huge difference.

 

When we meet up in August in Seattle, come for a ride in my car and see if you notice any difference with all the stuff I've got. It's been so long since I did the rollhoop blockers and headrests and drilled out full size screen, I can't honestly remember what it was like before. I just know that it's quite tolerable but I may have simply gotten used to it.

 

Why don't you get the Full "full size" windbrake, also known as a Hardtop?

I like the wind through my hair top down, the OEM windbrake is good enough for me.