| KCS 3997, now working for its 3rd owner, was originally GM 72, She was built as a ACe testbed, and worked on BNSF, KCS, CSX and Union Pacific. GM Sold EMD to Greenbrier in 2005, and she was the only SD70ACe that was not given the EMDX reporting marks. In Late 2006, EMD sold three of the Demos to KCS, and one was retained by EMD |