The Driver rig did operate but was too fragile to let stay that way. I made it stationary in the traveling position.
This kit was a real nightmare. It is a San Juan kit which is no longer in production. The instructions may have been thrown out the window for all the help they were. I had to watch a video of the real Pile driver to see where to put some parts and rigging. But all worked out.
I had a flat car made already as the one that came with it was not good. Lots of loaded tools for you to see. I put wood beds on almost all the flat cars I build, they look better than the thin plastic.