All of the pieces for this set came from two of the smallest power miner sets, you can probably guess which ones.
If I had made a video, you would see that as the treads turn, the drill on the front also rotates, however there is no way of showing this in a picture. I also attempted to make this as asymmetrical as possible, which I never do, so it was fun.
And yes, the "driver" in the back is doing absolutely nothing.
Hey, Zane, just wanted to say goodbye and wish you well. I'm setting my legos aside and leaving my account inactive, but did not want you to think I had abandoned you. You're a gifted builder and have a good sense of humor. I greatly enjoyed bantering with you, and valued your generous and informed comments. All the best with the hobby and your studies. Perhaps I'll log on from time to time to see what is new. Take care.