Still no news on a build for the Saltfork members. ( not sure why, because 24 of us signed up to make them)
My friends and I have been forging ahead on power hammers anyway. We have almost all of the stock cut and have welded the main posts to the bases on three of them, I'll start a 4th next week. A minor variant I'm going to try is to use a 32" - 36" round base rather than the 2' square one. I think the 2' square base is a little small and the round base will have the anvil close to the center of the plate. I picked up (2) 1/2 x 32" rounds today. Using them for bases should promote a better balance, which should reduce vibration.
One of us had some 5/8 plate we used for two bases. Those bases are 24" x 36" and should be more stable than the one in the plans, which are 24' x 24". I think the round bases will have the greatest stability of all. The round ones I got were scrap, so I will look for 36" round 1/2 " plate. This would allow for the anvil to be set in the center of the round plate , giving it better balance than the plan base.
I'll update again when we weld again!