I've been thinking about replacing my finger tab. It's never quite fit me comfortably and the leather is too thin/floppy. My fingers get sore after about 30 minutes of shooting. I asked the knowledgeable Chris Hill what he recommends, and regarding the thickness of leather, here's the rule of thumb he suggested:
For each 10# of weight on the fingers, 1mm of tab thickness. 20# on the fingers? 2mm thick tab leather. 30# on the fingers? 3mm thick tab leather. This is a guideline I think I can remember. Just in case I can't though, at least it's here on the old blog.
