20 years ago we dismantled an EBPVD coater from a GE site and reconstructed it here in Indianapolis. As a result documentation of our controls was never very good. Over 20 years things have been added and removed and a jumper added here and there. As the components age and we find ourselves doing more and more maintenance we frequently find ourselves holding a wire without the foggiest idea of what is on the other end. Has anybody worked with a contractor for reconstructing control system documentation?