Claud,
I think you understand exactly! Great design!
Just a bit confused though about the removal of the bottom half of the overflow pipe.
Is it cut in half down the length of the pipe, and I'm only seeing the top half laying down between the pots?
Also, you said you filled the "pots" halfway, set the plants, then continued filling. Did you mean you filled the "box" halfway?
You deep rooted the tomato plants to a depth of 9" from the top of the box? Did you plant the seedlings strictly vertical or did you curve the stems into an "L" shape for more depth?
Caroline: THANKS FOR YOUR PATIENCE!