Cambo Master PC Problem

[Imagemaker]

I just picked up a fine Cambo Master PC. The camera is in nice shape overall. She was sitting some place for a while, so a good cleaning was needed. The only problem that I have is looseness on one of the standards. After everything is locked down, the standard wiggles back and forth a little. I think the problem might be the lateral shift lock lever. Any suggestions would be appreciated.