Guest - 7/29/2006 21:47 Fifth, drpaer head adapters, self-contained hydraulic systems and the remaining hydraulic and electronic interface problems that a shortline header manufacturer has for not being privy to all of the actual combine specifications and the rate of product and model changes made to the combines. I doubt very seriously that any of the big four combine manufcaturers have an honest to goodness working relationship with any shortline header supplier since the combine manufacturers have their own header to sell that are specifically designed for use with their own combines and are kept current to all combine specs and changes.