A friend has a few 1033 transformers that work well after minor servicing (cleaning contacts etc) except the Achilles heel of this model is that the whistle/direction handle shafts get sloppy. Over the years owners often break the plastic handles, and we have replacement handles, but the shafts themselves often get worn and sloppy and we see no easy fix for that, and they are inconvenient to disassemble further. Any suggestions for repair would be appreciated. We like to recycle these otherwise reliable transformers.