Well, so now we have seen some reviews of the new LEGO models, and modifications and improvements of the other ones, and i think its time for the 42055, so lets start:
My first modifications would be improve the force of the bucket, because as far i could see, the bucket is driven by the chains of the conveyor belt, so even an small object is able to stop it (like Sariel showed in his review), i would put an axle going from the gearbox directly to the bucket, or even a motor behind it, so there would not be too much power loss.
Another modification i would like to do is in the tracks, i would like to put an small gearbox in the lower frame (i think there is enough space there), to select between some driving types, maybe something like a subtractor gearbox.
And for the last, i would improve the turning system of the lower conveyor belt, as we can see in the review of Sariel, there is an small backlash in the system when the excavator changes the turning direction.
So post any more idea or suggestion you have for this huge and impressive set.