Good idea, but the thing that I think is causing the problem is the fact that the laminate floats on a thin layer of foam. Even above the supported joists, it "gives" just a little.
I was wondering, though, the industrial strength slotted wall standards as you call them- would something like this be available at my friendly neighborhood Home Depot/Lowe's?
I was wondering, though, the industrial strength slotted wall standards as you call them- would something like this be available at my friendly neighborhood Home Depot/Lowe's?