I was working through my pile of metal out the front and this old weight came up. I often look at things from different angles and the side view sort of suggested an old engines cabin. There is an eagles or Guy clark song with the line” desperados waiting on a train” and in this case that is precisely what it is… a weight on a train!. Silly, yes but it did make me create this cobbled together engine including an insulator, a weight and a piece of leaf spring. So much fun.