just received my replacement pp256 yesterday, noticed right away a few changes, they incorporated a tig cooler plug in at the back of the welder, main electrical cable is heavier guagei`m not sur eif my old one had this but looks like they added dots for increments on all the dials, there is supposed to be an upgrade as well on the plasma capacity side, lots of nice little changes! Thanks Duncan for the great service!! I`ll fire it up this weekend and give her a go!