Here is the knapping bench I copied from a youtube video, don’t remember which one. You just need a long mill file, brake it, grind the ends to and edge, hammer the tang (carefully) into a section of log, and weld the smaller section of file onto a metal rod to make the hammer. It works good for breaking up nodes. I made a template for sizing. The bowl is full of Texas Chert, maybe some Missouri Chert too. The big node is English Flint. And there’s a photo of some of the few flints that are usable, some of which I touched up on my diamond blade wet/tile saw. I plan to make one of the copper/lead mallets but haven’t gotten around to it yet.