I ended up putting some 1.5mm heat shrink tubing on the center of the stabilizer wire to reduce vibrations, and on the ends where it enters the stabilizer pegs. Interestingly enough, the holes in the pegs seem to be tapered, so with the heat shrink tubing all the way to the ends, the wires wouldn't fit. I had to leave a couple of millimeters of the wire ends bare. I filled the stabilizer pegs with Super Lube grease, which seems to help quite a bit, although the amount I used made the space bar pretty slow to react until I used the keyboard for a couple of days. It's nice and responsive now, and quite a bit quieter than the un-modified space bar on my other Realforce R2. I didn't do the Band-Aid mod since it didn't look like it would do anything after looking at the way the stabilizers are constructed. They snap into the underside of the plate and don't appear to contact the PCB at all. They also snap in very securely, and don't appear to have any slop or movement. Even a Band Aid would prevent them from snapping into place, I think. So far I'm much happier with how the space bar is.
