So worst cast you go thru an extra packing and just look at it as a cost to do the repair. This would be a billable for anyone unless its the company that installed the jack in the first place. We have a good union machine shop we keep very busy here in town. With a dozen mod crews and a couple repair crews we are having custom plates made all the time. Also machine work on shafts, bearing pressed on and off ect ect all the time. I just assumed a relation ship with a machine shop was something all elevator companies had. A good machine shop is faster and cheaper than sending things out. Pieman we first worried it might travel up and down but it didn't . Slid right to the bottom and stayed there. Good Luck