This will be my 17th duck rig im building now and i can give you some opinions on the whole wind blocker/shad thing. If you are building a hard sided blind like you mentioned in the beginning of this thread then you DO NOT NEED ANY WIND BLOCKER. Here is my experience on the wind blocker vs non wind blocker. The extra material was great for wind proofing, and rain... HOWEVER it also cast a shadow when the sun was behind you and caused birds to flare because of it. Sure it was comfortable but the point was to shoot ducks and it did not perform like the one without the blocker. I have had better success without the wind blocker and tons of grass instead. This boat with ZERO wind blocker flat out smoked the ducks This boat with a wind blocker flared more ducks than i have ever seen. This is the only pic i have but the entire thing ended up looking like the front did. It had a flip back lid, and could close within inches to see out of. The top pic even had an open top. I always felt the shadow it cast was a problem.