Lew, You are correct! I mentioned that way back on page something-teen, so I don't blame you for not seeing it. Most of it came from a deep, 6-foot tall bookcase. The rest was from a rear projection television my late father-in-law had that the projector blew out. What a monster that thing was when I tore it apart.
Mallard, I won't ask how you know, but I do have a lot of material I salvaged from my dad's shop last fall before we sold the place, and I can buy some more 1x2. I will attach bracing. I have always used carpenter's glue, but I am starting to like Gorilla glue. Thank you!!!