I bought the 12 ton press when I was putting together several HK rifle receivers. I did what I could to stiffen up the unit, but nothing like what you have done here. I think that I may have to revisit my alterations, and go more for what you have here. I especially like the rollers and the knob for the jack. Nothing more frustrating than trying to use the OE bar for tightening and loosening the valve on the jack.