Looks like they force you guys to go back to 2 pol crap
Quote:
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External shaft diameter may be either 0.125 inches (3.175mm) or 0.197 inches (5mm). Only one piece, two pole Neodymium sintered, or Ferrite (Ceramic) magnetic rotors are permitted. The magnet length shall be a minimum of 39.0mm and maximum of 46.0mm not including any nonmagnetic balancing material. The magnet outside diameter shall have a minimum of 12.3mm and a maximum of 14.0mm, no tolerance, for the entire length of the magnet.
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