I sometimes get pretty busy in the "mod" community. I modeled and setup nearly all the imperial vehicles to fly for "Galactic Conquest" star wars mod where we converted Battlefield 1942 tanks and planes into Star Wars stuff. I just wanted to see that happen and it was fun. I rigged and animated this using the ATAT HD solver in 3dsmax a long time ago. Note that the joints slide into the shoulders. It was a fun robotic rig. Too bad 1942 didn't support that kind of animation system for the vehicles so someone had to script rotation bundles for a clunky walking walker in game.