I had a higher end Dremel that would intermittently die because the brushes got stuck in their channels once the motor warmed up. I was so happy when the speed

I had a higher end Dremel that would intermittently die because the brushes got stuck in their channels once the motor warmed up. I was so happy when the speed controller died and I replaced that garbage with a $20 Menard's unit that's been bulletproof.