Yeah I remember most of it. But there was something about the current meter on the ground wire.
Where do you measure the 0.7 voltage loss though?
With a board powered on, measure the voltage across the 5V source on the power-supply banana connectors, then between the black banana connector and ground on the MPU board, then between the 5V banana connector to 5V rail on the MPU board.
Back to the original question, how about the chip temperatures between the Bally and Stern boards on the bench? Similar or different.
BTW, can I make a suggestion, every PC power-supply has the red wires as 5 volts and yellow wires as 12 volts. It's almost defacto. Feel like changing them?