What are those locomotives. I've never heard of them, so you might want to explain what makes them special, where they run, etc
The ST70AH is CSX's designation for the Progress Rail/EMD SD70ACe-T4. CSX owns 10 of the units, and they should be added to CSX Sand Patch Grade. UP has 100 units, and the UP version (designated SD70AH-T4) would be awesome to see handling heavy freight trains over Sherman Hill or Cajon Pass. I also really like the Progress Rail/EMD Prototype #1501's blue, white, and green livery, which reminds me of GE's GEVO Hybrid. There is a PR/EMD Lease Unit livery that is called the "Banana" livery because it's yellow. The SD70ACe-T4 has EMD's new Tier 4 compliant, 4-stroke, 12-cylinder 12-1010J prime mover that is a reworked 16-265H engine used on the 6000HP SD90MAC-Hs. By the way, since it's a 4-stroke, the 12-1010J sounds more like a GE GEVO engine or 7FDL-16 engine than an EMD engine. The SD70ACe-T4 looks like a mix between the SD90s and the older SD70ACes with the teardrop-shaped cab windows of the older SD70MACs and the massive flared radiators of the SD90s. I'm a big fan of the new SD70ACe-T4s, and I really think that they need to be added to TSW3 (and also TSC) with some new modern rolling stock to pull behind these modern beasts. An SD70ACe-T4 pack should include the UP, CSX, Progress Rail/EMD Prototype Livery, and PR/EMD Lease Units in the Banana yellow paint scheme.
