Set backs?, I sitin so far back, I think I've done fallen off the edge! Too bad they broke. At least you can make arrow heads out of them. I made one little arrow head, out of a piece of thick obsidian, I was fianally able to get it down, to some what thin, or rather thinner than it was. I thought I was going to get a decent sized arrowhead out of it, but it ended up like my usual, about a little over an inch long, by about 3/4 wide. I didn't think it was very sharp, till after I was washing my hands, and noticed a bunch of little stings on my thumb, fingers, and hand. Anyway, I thank you for showing your $#@@##@!! moments. I don't feel quite so bad now, that I see even those that are accomplished knappers, have their $#@##@!! moments also. I hope you are able to make some very nice arrow heads out of the left over pieces.
Wayne