It definitely won't tip over
. Because it's heavier than it needs to be, it probably wasn't any cheaper using used material in the end. If I ever get bored enough, I'll do the math. I inset the legs in the basic design so that I can push the top flush to the walls accounting for the extra width of my concrete stem walls at the bottom.
Reading through the thread in the planning stages, I saw a comment about leaving room for a tig pedal. Since using my new tig was part of the motivation for the build, I made the bottom just big enough to hold my saw and an old craftsman toolbox lower for clamps, grinders and welding supplies. I picked up ideas from several people on this thread.
This weekend I plan to add pvc tig rod holders on the right side and a sheet metal tray under the slats to catch weld spatter.
Thanks again for the inspiration.