A lot of people had no idea how to set the dwell on a dual point distributor. In reality, it took a little longer, but was simple once you knew the main trick, which was block one set of points open with a piece of cardboard, then set the unblocked set, then reverse where the cardboard was, set the others and if you had them both spot on, when you unblocked the other set and ran with them both, it was spot on.
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