Heres the deal. I was going to build a permanent blind in east Matty but decided to outfit the duck boat to be mobile. I have a custom 20 foot flat bottom that I built with a 90 fourstroke yammie. What do you suggest as far as what materials to build the framework out of? I am an expert aluminum welder (as well as steel). I kind of wanted something that I can put together when I get out there. What about pvc, is it durable enough? The boat already has a permanent railing that I welded in but its not tall enough and I am looking for something to suppliment it. Do you think I should build out a kick butt boat blind or a permanent blind in the bay??