I built a permanent blind on my boat out of 2x4's which were ripped down the center. I made it like a A-frame with a flat top. I wrapped the blind with sheetmetal. The blind has three shooting holes in it. We closed in the front but left the back open. We then painted the outside and stenciled it in. After that we put plenty of brush on it. We attached the brush by making bundles and using one stick on each side of the bundle and screwed it in through the metal to the wood frame, this worked really well and I never had to re brush it all year. From the bottom of the boat it is about 3.5' tall. We have used it for two years with no complaints. We have also never had a duck flare off of it, unlike your popup blinds which you pay to way to much for, when just about every duck that has been hunted before will flare off of them. This blind from start to finish cost about $200. We constently get compliments at the lake and everyone wants to know how to build it. If you need more info just let me know, I will gaurentee you will be happy. The only draw back is it wieghs more than most blinds but is well worth the extra wieght. My 25hp pushes it quite well. :thumbsup: