Now I'm not the type of person to complain about sounds that much but I have to admit. While I have thoroughly enjoyed my purchase of Audie's SD70ACUs. I've noticed that the current sounds of the ACUs are a bit lackluster to say the least. They're the same 16-710G3B sounds that are used on the SD70 standard cabs aren't all that accurate compared to the real ACUs. Especially the Idle. However, I've noticed that the Searchlight simulations versions of the JR ACus graciously ported over to railworks by Woody have sounds that are a lot more accurate to a real 16-710G3C-ES that the SD70ACUs use if I do say so myself. So I've got to wonder, will the railworks sounds ever be ported over to trainz? For the time being I'm using NARM's normal 16-710G3C as a stand in. Not the best but it works.