ALCo produced a 4-6-6-4, Class Z-6,  for the Northern Pacific followed by identical models for the Great Northern and Spokane, Portland and Seattle (the latter two lines bought oil burning locomotives whereas the NP bought coal-burning locomotives).  One design, three railroads.  A Spectrum-quality model of this engine would be greatly appreciated.

Is a Bachmann #89842 long vanderbilt tender compatible with a Bachmann #82501 USRA heavy mountain locomotive?  If not, is there a long vanderbilt tender that is compatible with the #82501 locomotive?