Has anyone thought about dies with a hole in them? Thinking about a homebuilt powerhammer again, and got to thinking about drilling a hole down into the anvil block, with a L hole off the side (for scale and such to fall out), it wouldn't interfere with regular dies in the hammer, but then you could also switch out for a die with a hardy hole in it that would line up with the hole, and allow you to upset/head over different things that are long.