Not me, but I fixed an Erector Set motor by rewinding its coil. A friend gave it to me, not working. Of course, i had no money to buy new wire, so when I unwound it, and it broke into four pieces for every loop, it scraped the enamel off every end and twisted it together and wound it all back up. I think the mistake I made was wrapping that in electric tape, the black cloth electricians tape, instead of in plain cloth. I turned on motor and it worked, but after a while it started smoking. The adhesive I think. If I'd used plain cloth it might have worked well.