Here's a method I've wanted to try, but the right gun has not come along. It involves a pad and a wood graft as a spacer, but the difference is the wood spacer is checkered finely all over, about 22> lpi. I wish I had pictures, but I don't. It's seen occasionally on Parkers, and Julias sold several Parkers back a few years ago on which this had been done. A leather covered pad would be a nice accent if you don't like the eraser look.