How to Build a Planting Grid for Square Foot Gardening

In preparation for this year's vegetable gardening, I've been reading Mel Bartholomew's All New Square Foot Gardening (see below). One idea that I got from the book was to build a planting grid with wood lathes to stay true to the square foot gardening philosophy. Just as the book promised, it was easy to build and hopefully will make my vegetable gardening easier and my yield greater. Here's how I did it:
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1. Gather together your materials and tools: 6 four foot wood lathes for each 4x4 foot grid you want to make; nuts and bolts to hold your grid in place; tape measure and pencil; and power drill.
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2. Measure and mark your wood lathes in one foot increments.
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3. Pre-drill the holes in your wood lathes at each one foot increment. Pre-drilling is important as the wood lathe would likely break without doing so.
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4. Screw in your nuts and bolts to hold together your grid. At this step, I found that I actually needed to re-drill some of the holes, as my wood lathes were not all perfectly straight.
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5. Take apart and put back together again. Well, hopefully you won't have to take this step, but I did. As you see in the second picture, I realized that the grid was 4 x 4 for sixteen squares, but what I really wanted for my raised vegetable beds was 4 x 5 for twenty squares, so I wound up taking the grid apart and re-attaching one set of lathes at 6, 18, 24 and 30 inches.