They spot reweld each connection of a rail to the main green frame? That isn't fascinating. It is boring. I cannot imagine the main frame can handle that kind of rewelding over and over again. Yet, I cannot challenge, as I know little about steel or rollercoaster engingeering. So, I will just go with your facts for now. I won't quote them... but I will go with them. And no, I do not know NASSERO or whatever that is.