Mike,
I found the plans for the cart still on the web at:
http://www.woodmagazine.com/wood/sto...y/data/494.xml
If I remember, the dimension on the drawing for the plywood base is not quite right ... measure the width before cutting it out. Also, I added another rail "G" on the back side about 14" down from the middle one to support cut-offs stored in the backside.
I have found this cart to be an excellent addition to my shop. It can carry an enormous weight, so don't stint on the casters ... use at least 3" diameter.