So I made a few mods to my hammer, rebuilt the pitman and made the top end attachment point adjustable. Haven't run it hard yet beyond the initial test runs, but it seems to be back to hitting hard.
In other news, I made a deal with a local steel distributor and have personally brought home roughly 3000 lbs of steel, plus a buddy took another 1700. With the rate I'm getting, I'll pass on most of it and get mine for free. I was able to get a couple of good power hammer anvil options. One 47" by 6.5 round at 440 lbs, although it will need to be cut down some, and another two pieces to stack, one 275ish lbs 10.5" round with a 6.5 by 18 220 lb on top, 490 lbs total if I remember right. Also got a 30" circle of 1.75" plate at 350 lbs for the base plate. I'm going to build a 50ish pound tire hammer, a mishmash of Clay Spencer's top end linkage and whatever I engineer for the rest. Goal will be a heavier hammer that's more compact.