Thanks, it has worked great so far. I know what you mean about having all your tools out by the time you're done with a small project...
I thought of casters and decided that's not such a great idea. The rack is not that big or heavy and I wouldn't want it running around the floor or bench. It's not much more than a portable tool box and we don't see those with casters.
Sure a bigger version might need wheels but a small portable one you can pickup the wheels would be unnecessary and problematic.
Grigg