Anyone wants another "blue light special" I will sell you a built and tested circuit and a hall sensor and magnet for $35 plus shipping..It takes 200 ma at any speed and will run on 4.8 or 6 volts..I have used these for 16 years and they are very reliable...They are larger than the C&H circuit....You will need a spark coil ..This is the bare circuit only, no box..
Coils are available from C&H, boxes from Radio Shack....I don't recommend Modelelctric coils because of the high voltage input from the CD circuit.....

If you send me your address and total I'd like to get one of your blue light special....Mike