So, UP ran the SD90MAC-Hs and H2s for a number of years before getting rid of them. The H2s to KCS and the Hs now in Denver awaiting disposition. UP had years to study availability, and Maintainability. KCS appeared to abandon them after a matter of months. So what specifically caused them to give up so quickly? I mean you would think anything they learned in those months, UP could have told them from the get go.