Larry, those are awesome!
I'm looking at doing the same thing soon, and was planning on doing L brackets just as you did. Glad to see it works well.
Could you possibly post a photo of the inside structure of the cabinets? I would love to see how they are built/reinforced.
Humpphhh- you're gonna force me to get the camera out..... Larry
(couple hours later) Here are some shots of the cabinents--- hope it helps. The bottoms of the shelves are just installed in dado cuts (with tiny screws and glue) on the outer side opposite the aforementioned "L" brackets on the fiberglass wall side. If I remember right, the back shelf was designed first, then the sides. But, the side faces were put on first then the rear center section installed last (with the bottom rear portion "floating" awaiting the dado cut. Make sense? The sides are tagged from inside the closet and the cupboard on the front side. The front shelf shot also shows how I rehung the cafe' rods for the curtains. Larry