I have the same harbor freight 20 ton press. It worked well for doing my rx7 bushings. I think some of the side holes too are slightly off. So when you slide the stopper bar in it's kind of at an angle and not completely parallel. It's worth the money and I'm sure it will work for everything I'll ever need to do, but at the same time I kind of wish I would have bought a better one just because. My gf's dad has an older sunex one that is much more rigid.

