Resurrecting an old thread here. Ive got a rebadged 452 (Montgomery Ward) and have identified it as having a busted rheostat. Ive debated what's best for returning speed control to my unit, and think that it'd be worth trying to just replace the rheostat. Do any of you know what ohm rating the factory rheostat was? It's labeled "TKR9". See attached picture. What are y'all's thoughts on my plan vs doing something completely different for speed control?