I bought a Case 580 SE with the three lever ( and one for the extension) with foot swing. I want to switch to four lever controls. (from left to right: boom-swing-dipper-curl) and the extension on the right foot pedal. I had it done on my last Case backhoe by a mechanic in California. I live in Bellingham, Washington now and don't know any mechanics. Don't want to go to the dealer. I could do it if I could swap the boom and curl valve banks. Easier said than done I guess. Has anyone out there ever re stacked the valves on a Case?