Re: Roadster Wind Blocker
I bought the DC windscreen when it became available - the one that fits between the loops and fastens with velcro. I did NOT screw the lower guide into the car. No way did I want permanent holes. It occasionally squeaks but I simply remove it and wax the loops, and the noise goes away. Be careful to clean it with a soft lintfree cloth and use some Armor-All to remove any swirls.
It does reduce the wind somewhat but does not eliminate it entirely from blowing on the back of your neck. It seems to come in through the loops and blows around the seatback. But it is less than without the deflector.