Nice lumber stands everyone.
Hmmmm why are the greens shorter? I always just cut them flush with the top and cap with plywood...seems like more support for the top that way
I do too. The only thing I can think of is that if you didn't have the plywood top, and the top horizontals shrank a tad, then it would be possible for the tops of the four corner green verticals to stand slightly proud, and maybe put unnecessary pressure on the bottom corners of your tank.
But with a sheet of ply on top, even if this did happen, I think you'd still be pretty safe.