Quote:
Originally Posted by Kabong
Make sure to lap your corners like this to give the best support
Goggle sketch up is your friend 
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i think to get that to work best, i think i'll use 4x4's for the 4 corner posts.

this way there's a shelf already, can put the plywood and styrafoam there and it's done. my husband says it'll probably work good that way too, and 4x4s are stronger. what do you think?