My first tumbler was a cheap Frankfurt Arsenal from Midway, it lasted a little over a year....it burned out after I forgot and left it running over night. So I got another, it only lasted 6 months even though I was careful about how long I ran it. So in Mar I popped for a Lyman 2500, I figured that was big enough to handle anything I would do....it suspossed to handle 1000 .38 cases or 350 30-06 with 6 lbs of media. So last weekend I dropped in 150 .45 cases and went out to mow the yard, when I come back a couple of hours later it's barely vibrating....it's not totally dead but not functional. I'm going to call Lyman about their warranty sometime this week. I'm running these on the floor of my gun room in the basement, tile over concrete, so there should be plenty of air flow and I'm usually only doing less than 400 cases, most of the time less than 200....so am I missing something or just had bad luck?