Some tanks only need support at the rim, but they need it on the ends as well as on the front and back. The way I understand your description there is not end support? I have several tanks with just rim support, and no plywood or other 'table'.
The other issue I see is that a square (rectangle...) construction can shift. Add a shear panel or a diagonal brace to stop this.
Ditto Hoppy: Do not lean the stand. Connect it to the wall with some method that provides the stability without compromising the 'Plumb, level and square' ideal.
The other issue I see is that a square (rectangle...) construction can shift. Add a shear panel or a diagonal brace to stop this.
Ditto Hoppy: Do not lean the stand. Connect it to the wall with some method that provides the stability without compromising the 'Plumb, level and square' ideal.
