I asked some people that know more about punching thick steel than I do. They said that it would not work for a bucket pin where the pin was moving.
So I scrapped that idea.
My new presses have a single acting hydraulic pumps.
I just ordered CH-70 and it will use one of those pumps. I will need to add a quick connector for the hydraulic line.
I have a 5 off coupon. Not to bad for a shipped price.
I will need to get some square dies and oblong ones.
some specs.
Here is one working.
It is like this one and this video is in English.
I would have bought the 50 ton one but it requires double acting hydraulic pump and I only have single acting pumps.