I have very few faults with my railway John, and one of the reasons I suspect is because I maintain it. One motor in 12 years - not exactly expensive is it. Do you put secondhand oil in your car? - thought not.
I think you missed my point Alan, I am a great believer in recycling where at all possible and I believe that point motor may be salvageable, well worth a try. And yes Maintenance (regular preventive) is always to be applauded.
A little late to the party, but I use Aircraft mastic to seal the screw and cable entry holes on my LGB motors.
I've mentioned here before that I have replaced rusted terminal blocks on some motors, by hard wiring them to a short cable that is long enough to connect to a corresponding motor's terminal used in a crossover configuration. I use a single decoder output to change these, and simply lengthen the pulse to maximum, which I find is adequate to change both motors together.
An example would be the junction above. Both the points are changed to either the straight road or the diverging one, as a pair. I added the LGB EPL supplementary switch units Type2 to operate signals. A single point decoder output had enough 'oomph' to drive both motors and the supplementary switch....