Casio DR-210HT adding machine - repair and demo

Another adding machine packed it in at work - let's see if we can bring it back to life. Afterword: The JB Weld failed, in a different fashion - the gear stayed on, but the motor shaft would slip within the gear when the printer was under heavy load (ie. printing a long number). I re-did it with Gorilla glue, and it is still working after a stress test.