The system looks fairly complicated.....  You'd think they could make it a lot simpler / and safer with a geared track. Plenty of engineering challenges with that too of course.,(reply>), well it is but trying to make it more simple is hard too we have to wait until we have new technology that can actually work like that and it is simple and really safe but until then we would have to use that and improve it until we have something that is easy and safe