I have never used any plans, I just build!!!! I built one this last year and it turned out nice (6X8)...
I started with 4X4 treated post's as my corners and then wrapping 2X6's around the post's at the level I was putting the floor in at... Then wrapped 2X4's at the top and bottom of the window heights, at this point I wrapped with plywood, trimmed it out, built the door, put the tin on the roofand then put some paint on it and seal all the cracks with silicone and spray foam insulation... For the windows I used some plastic rails I found at home depot, screwed these on the outside of the box blind and these became the tracks that the plexiglass windows slide in... Tinted the glass, sealed the gaps in the windows with some door seals and it was finished...
Took the wife and my oldest daughter hunting this year and foundit to be a really comfortable stand thatis quiet, which is a plusconsidering my oldest can't be still or quiet for very long!!!

This is all the pic's I took, I now wishI had taken pic's during the construction phase...