Great thread. My new treadle hammer (a prototype by a maker who may go public once his design/construction is dialed in) has nearly 50lbs of lead in the head. It is fun getting to learn the tool and certainly when doing fullering/flatting this machine can greatly speed up what I can do with a hand hammer. Still I love having the option to either use a hand hammer, which can offer a very different type of control and power. On another recent project, drew out the tang for a knife on the treadle and it was so easy. Far more efficient movement of the steel per heat than with a hand hammer, and far cleaner result because of the flattness of each blow. Looking forward to doing more piercing, cutting, and drifting to see how that does as well. Expect that to be far easier on my arm and faster as well. Will never crush big pieces of steel anywhere near as well as a power hammer or a hydraulic press....not even close! But it is going to be an arm saver for me in the months and years to come.
Ahead, I will need to make some additional smaller flat dies to help target the blow (1 1/2" top and bottom will be good for me) and make also some some rounded/angled dies for specific fullering. Already made a little angled fuller for setting the initial V-shaped grooves on a folded axe billet. Fun stuff!