This Upgrade would include model upgrades for SD70M/SD70MAC/SD80MAC/SD90MAC(Window shape upgrades) SD70ACE/SD70ACE Iso/Cab/SD70M-2(Window Shape Upgrades) ES44AC/ES44DC(Window Shape Upgrades) For the SD70M the Window shapes and nose Are wrong they would get upgraded also the back of the flared up sd70m the line is slanted at the top wich is weird For the sd70ace and M-2 the window Shape upgrade can also be based on the sd70ace from TSW since it's accurate in that game GEVO's the Upgrade can also be based on TSW since it's also accurate there This upgrade would make the locomotive much more realistic by only fixing the windows and the nose for the sd70m
Just to point out, the models in question are very old; the ES44AC is getting close to 20 years old now. They will not be updated, as model changes break any reskins made for a train. Feel free to create your own child objects to add missing parts though.