Tom that is some good photos, What I'm trying to get across to folks is that the standard rock mounted on top of a stick with leather warped around it, is not right. Tomahawks only worked well when the head was metal. Grooved axe heads had to be held on with something of some type of strength not just leather. Most were held on by splitting the limb or by smaller limbs coming out of the handle wrapping around the head and then anchored to the handle. Also they used natural tar, pine pitch and animal hide glue along with wet raw hide that would shrink to being very tight when dried. On atlatls JMO they carried a few spears at first and then they learned that by making a shaft that had a bored out shaft in the end, they could mount their points on small short shafts. The theory behind this is when the shaft is thrown with the atlatl when it hit it's target the shaft would bounce off leaving the point in the target and the hunter would pick up the shaft to throw again. With this style all they had to do is carry a small pouch filled with points on a small shaft with maybe a extra throwing shaft. JMO this was done for 1,000s of years and that is why we find so many dart point.