Maybe this the reason Sherman Hill is considered more challenging than others - simply you dont have air brakes in rear DPU locos!! EXAMPLE: (XBOX S)sherman hill case: intermodal trains, ac70ace (DPU LEAD: banking comm: on, brakes: lead and cut in) NO air brakes control on the rear DPU units, i terms of air braking they are slaves/useless (Other functions ok: reverser, throttle, dynamic brakes works), no respond for independent braking or automatic brake (brakes checked by watching DPU rears brake cylinders with outside camera, brakes respond to manualy handling manipulation i. e. through window). It is real lack of control not a lack of animation. - ONLY emergency brakes works on the rear dpu locos. UPDATE: ES44AC, AC4400CW - the same problem in rear DPU locos NO AIR BRAKES CONTROL (dynamics and other function works just fine) ES44C4 - in DPU everything works perfect!(air brakes respond acordingly, visible moving brake handles and working brake cilinders and stopping power) Cheers, please check it guys, it breaks the game.