Funny story! I have only a little easy flaking rock left so I’ve been breaking my wrist on some horrible Texas stuff that completely destroys my hammerstones and my already destroyed bopper. Then.... I find some obsidian spalls hiding in the corner! Seems to me like I got pretty good aim from needing to hit that hard stuff perfectly and I can now hit my rock, not hard per se, but very fast and I now am Now seeing a lot of growth in the stage that I get my rock to! Thank goodness for obsidian!