Built with 1x3's, doubled up on corners. I used 3/4 ply for top and underneath and 1/2 for bottom of stand. I was going to use 1/8 but figured since I already had the 3/4 - 1/2 ply, might as well use it. The sides are 1/8 ply. The stand is very sturdy even with 1x3. If I had to do it again, I would probably use 1x4 or 1x6, but definitely 1x's are preferable over the 2x's and it's just as sturdy and much straighter and easier to work with.
Lauan plywood
1x3 frame






Lauan plywood
1x3 frame





