I spent much of the spring traveling around the country visiting shops with power hammers doing research for my next book. There are a number of new hammers out there that are SO MUCH easier to adjust than the older legacy machines. Here's a video of how to adjust a Baileigh hammer. I really like the Chris Rusch designs, but there are others coming along, too.
https://www.youtube.com/watch?v=kM5YDVOeRdk