I must not be living right. I was working on the boiler on my new Roundhouse 4-4-0. I used my Dremel to grind off the old dome locations and didn't cover the motor well enough. I had the frame and motor wrapped in plastic but metal shavings and dust must have somehow found their way to it now it runs very sporadic and shorts out on curves! Argh! I will disassemble it again and give it a good cleaning and use canned air to blow it out real good. I hope that fixes it. Any other suggestions?