Ingenious stuff N22. May I ask what may seem like a dense question but why include the vent in the first place? Not wishing to appear rude or nowt but Shirley the point of the sidescreens is to reduce the gusts/wind (and I ain’t referring to the wind of the driver 😇). Nonetheless it does look an impressive piece of work sir!
HB

Plus Four Bentley Velvet Red “Grandi P”
Golf ehybrid thingy “Toadie”
Polestar 4 “Vger”