MM77, No idea on the spring loaded. I have about 2' wide flops on my boat blind and just flop it by hand. It sits at about a 20 angle from level. My eyeballs can look out over it on the water for appraoching divers, yet I can keep my head down for the Mallards.
As for the Flambuae brand--I have no opinion being I have not used it nor know of anybody that has. But is seems to be just like the "FastGrass' and Avery brand mats. The Avery does not hold up as well as the FG, based on my cousins experience--the Avery lasted 1 year and started to rot on his boat blind, whereas the FG lasted 3 seasons. That was a few years ago, so maybe Avery is better now, but I do not know that.
On the alum blind, paint the frame with several coats of green spray paint well before installation. Some will use the black plastic "x" pattern fencing used at construction sites as a backer to the mats and paint it to. Use black zip ties to secure it to the frame. Use your green camo over it so it looks the same as sides. As the season wears on and the cattails turn tan, add the grass mats then.
The Audacity of Bull Crap.
"Typical: Gun-loving, bitter bible-thumping white person" Barack Obama.
Hey I resemble that comment!!! Those are FIGHTING WORDS!!!