hi im in the process of planning my first plywood build. i would like to make it 2'x6' x6' tall. this comes out to about 540 gallons and will fit good where i want to put it. for the front and back i would need to seam together plywood pieces to get 6' tall. I want to use three pieces that would each be 2' tall. then i would put a 16" viewing window in each of the three panels on just the front side. i would seam the pieces together with probably 4x4s on the inside that way i could screw the plywood to them and they would also serve as a rest for the top two windows. then epoxy and silicon the whole inside of course. does this seem like a good idea? (as far as being structurally sound) if not what could i do to make it work? any help would be nice. thanks!