Paul... were you checking the resistance across that mosfet with it out of the circuit? Otherwise you're just checking the same nodes at each mosfet and you touched your hands to it.
Great work! I'm not sure if happy-dancing is in order regarding voltage spikes. I think that the spikes are directly related to the motor power. Keep it REALLY easy for the first few run hours to make sure that things are happy before you start to pour on the juice.
Btw, is your throttle controll system a relation between pedal position and amperage?
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