I have found a perfect spot on my little finger. As mentioned earlier in this thread, use the side of the finger, where it touches the one next to it. Which is roughly halfway between top and bottom. And about as far forward as about 1/4 of the nail, measured from back of nail towards front about 3 or 4 mm.
I have been using this location now for a few months, and it is only slightly calused, and I can barely feel it when it gets pricked. I’ve even set the spring loaded firing pin down a few more notches. I was at a tension of 8, now it’s down to 3. Sometimes I think I missed, but soon see a little bubble of blood show up.
Funny thing is, even though I don’t even feel it any more, I still cringe every time I’m about to hit the button on the lancer. Anticipating the puncture, and everyone relieved that it didn’t hurt