I got so entirely sick of farting around with hammering the stamps that I was ready to throw them away and get an etcher, but I decided to give an idea that I had had for a few years a try, and now I will probably still etch some but I am back to liking my stamps.
What I did was took an afternoon to go buy a 20 ton bottle jack and then build a frame around it to press my mark in. I almost went with one of the standard machine shop presses and now I am glad I didn't since the control I wanted came from a more specialized design, it only takes up about 12" of table top space and costed a total of around $40 to make.
No more off center stampings, double stampings, or washed out shallow ones. I just put the blade exactly where I want it, get everything centered and and then apply the tonnage, and it is a lot easier on the stamps as well. I am sure others have worked this out before I finally wised up, but now I am sold. If you still like stamps, give squeezing them in a try.