An alternative to the rubber nubs is a drop of clear nail polish. I started using it on dvorak rearranged keyboards. Not sure what is best, but I got some UV cu

An alternative to the rubber nubs is a drop of clear nail polish. I started using it on dvorak rearranged keyboards. Not sure what is best, but I got some UV curing type. A bit of alcohol removes the residue after curing, and you get a small smooth bump.