Unfortunately, now I can't find the big bag of nuts and bolts that hold various parts on the engine... so tomorrow will be an excavating party in the boxes of Jetta parts to find it. In the meantime, I installed some more rubber mats to go all around the workbench. I got one of them a couple years ago and they make a HUGE difference when you're standing on concrete. Those things would still be a deal at twice the price, in my opinion.
I cut these a little to fit, easy to do with a utility knife. The sections snap together with little nubs. Dirt and swarf fall down in the holes, so you don't slip or get metal slivers embedded in the soles of your shoes. The mats still lift easily so you can sweep under them occasionally -- say, annually, or whenever the holes look like they're about to overflow. ;)