I've made a few hundred. Besides knowing how to knock off good blades (you can make them from any suitable flake), the key is to have a proper anvil to shape them. I do little to zero pressure flaking to knap one. The secret is to have a stump, 6X6, etc with a flat iron rod driven onto it. I like a 1/4 X 2" anvil rod. I then use a bopper to shape them with the flat side up. Works well. Congtats on some fine flints.