Does anyone have a recommendation on an electronic timer to use to shut off a brass tumbler? Sometimes I forget about it and it runs really long. I would like to put it on a countdown type timer for 2 or 3 hours then it powers it off. All the timers I am finding are ones where you would have it turn on at a specified time each day and turn off at a specific time. Any feedback would be welcome. Wanna kill these ads? We can help!