Those are all beautiful points and well made. I would like to ad a little different perspective here. I will first say I have not taken a deer with a stone point, however a related experience this year has made me re-think my stone point designs. I was hunting with a recurve and my arrows were tipped with Grizzly broadheads. A small buck came into my stand and I took the shot. As things happen the arrow touched a limb and turned somewhat sideways prior to hitting the deer in the front shoulder. The arrow lost speed and the side impact caused severe loss in penetration. The Grizzly broadhead as you know has very square shoulders on the back. The deer bolted and I could hear the shaft striking saplings and limbs as it ran. I began the track and did not find the arrow as I had hoped. I have not yet found the arrow which I believe is unable to back out because of the square shoulders. I do pray it has since been pulled out by the deer, which I plan to do a large search once the season has ended. Some of the points that have been posted have what I would call barbed or at least square shoulders at the base. Now, I personally will not make a point to hunt with that has any square shoulders or slightly barbed in the back end. If circumstances happen and I get a bad hit, I want it to easily pull out. If it is a good hit and deep penetration or a pass through then it wont matter any way, so make a bad shot easy to remove or fall out. I had never considered this until this years event so I am only trying to relate an experience. You make your own decisions...
I am also going to grind the back of the Grizzly broadheads into a angle that will permit easy removal from game or target.