Bill's right. Hold the point in your hand, and squeeze both edges as though you're trying to squeeze the point narrower. It works, though not every time. Once I made an obsidian clovis point with both flutes running 2/3 towards the tip. I squeezed the sides, but also put the tip of the point against a small pine tree and hit the nipple. And it worked. Also a median ridge is important, so carefully control your flakes so they terminate in the center of the point. Just some ideas for ya'll to try. Good luck with this month's challenge!