Bob..looks great! I've seen these on youtube. Great if you do the work near your toolbox. Only real drawback is that you still need some sort of rail or tray for when you want to move tools a distance from the box. Love the ability for you to move the pieces around on the grid, though. (edit) Well, also the cost factor..like you say, isn't cheap.

That’s true, for mobile I have a small duffle bag with sockets on those metal rails, but I don’t have to go mobile too often anymore…