The support for the Stand, in the pictures, was built at home in the garage and disassembled for transporting and then re-assembled once in the field, all bolted.  I modified the plan you showed in your e-book and added some steps but still secured the Stand to the support the same way with small blocks of wood screwed to both Stand and support.  I still need a little camo paint on the support. 

Also the entire structure is attached to the tree as you described in your e-book.  Three of us guys actually picked the stand up and placed it on the support.  Using that T11, 11/32" plywood made it very light.  The second stand I'm building now will be with the smart board but this stand will be seated on the ground (actually on a rock surface). I don't know if you can tell, but the bench seat I built into the stand has (4) 1" thick layers of foam and a carpet seat cover.  Talk about nice! 

The carpet I put throughout the inside makes the stand very quiet.  I believe on the second stand I will use only wooden window latches because the metal ones do make noise when moving around.  It's really not that bad but the wooden latches work very well and a lot cheaper.