Not quite right, David. There's no giant nut under the ATD cover, but the electronic ignition pick up system. It requires a little spacer ring, which comes within the scope of supply. The clutch is a multiplate clutch, made by Ernst himself. To answer Chris' question: The charging system is a combined alternator/iginition unit in place of the magneto, driven by the timing system. The charger is available, the starter system still needs some more testing (Ernst is known to having everything of his developments tested to its very limit!)
Michael