The Midway 1292 tumbler had a recall over that issue. I sent mine back in 1999 and it was years old then. I’ve used that tumbler so much the brass wore through the plastic bowl. I got a replacement bowl and it is still going strong. Not too shabby for a bushed motor in a dirty environment.
https://www.cpsc.gov/Recalls/1998/cp...ll-of-tumblers