Bob, project is on hiatus 'til next week. Pickup roller assemblies are faulty, so no meaningful on-track testing can be done until they're replaced. One had no conductivity between the roller and its pins that mate with the arm forks, the other had a voltage loss of around 2½V. So the Blunami board wasn't getting full supply voltage when the Shark was on the track. Others have reported pickup problems with the Weaver Sharks.
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