something similar in the last year or two? Truth is that there are relatively few tools that I'd set up that way, but it would be a big saver of bench-top space to not have grinder, bench sander, etc. all bolted down.
I do use a similar approach with my reloading gear. It is all fastened to pieces of 2x8 that I c-clamp to the edge of the workbench.
Tim Douglass