To toss my hypotheses out here, the the drawer of the rough sketch of the blueprints had it wrong. There isn't two loading areas (one moving and one not) one section of track is the loopback. Due to the possible height variations with the Kuka, and digital projection for the domes, you ride through the same track twice but at different heights (revelling different show scenes and with different projections in the domes, remember, you can't see directly above in the bench) before your arm is guided into unloading. Probably not going to happen, but it was the first thing I thought of with the "larger inside than outside."