LocoFi'ed ScaleTrains HO Scale GE Tier 4 GEVO ET44C4 Burlington Northern Santa Fe #3712  "H1" Scheme diesel locomotive equipped with LocoFi 3 (DULLHB). Here's the link to the original product: https://www.scaletrains.com/rivet-counter-hypotypical-ho-scale-et44c4-bnsf-heritage-i.html