I am currently working on the A4T-1900 (2 prototypes existed - you can see a video of a RL one on youtube) The model has a proper transmission, throttle is animated, gear and group shifters are animated, clutch and brake will be animated and I am going to try to animate a lever for the 3 point lift as well. Since the body is the same, I can port it backwards to the 1600 though it may only be available as a Minneapolis Moline, not the other other models. (I am not a modeller and it needs to be textured such that it can be repainted.) Turn indicator on the outside of the cabin should already work (I haven't found any info for a turn indicator on the dash)...
Thanks!