I wound the coil this afternoon. I used a long #8 screw as the arbor. I had to "shim" the central square box that the arbor ran through with some small pieces of sheet metal to keep the spool square to the screw. I used a large fender type washer on the opposite end to contain the free end of the coil. It was not easy to keep the wire evenly spaced as I did the winding. I did the best I could. Note that it taped the loose end to the bottom of the spool and wound new wire over the tape buffer rather than risking scraping any coating off that lead. I carefully wound the first layer by hand and kept it reasonably even. After that, I unspooled about 10" of wire from the stock coil and held light tension on it, guiding the wire from side to side as it accumulated on the new coil. I ran the drill at a creeping speed till my hand was close to the spool and arbor, and then repeated the process. When the coil was about the same diameter as the original, I cautiously loosened the nut and started to pull the fender washer away, but the wire looked like it might start to spring off the loose end of the coil, so I tightened it back up. I painted some clear lacquer on the coil and will try removing the washer and coil from the arbor when this is completely dry. I may put a coat of lacquer on the loose end of the coil once the washer is removed. Then it's on to reassembly and testing assuming the coil stays together.
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