Hey qorax, could you confirm if a spring forms part of the conduction path in the atty? Kinda like in the eXpromiserI'm not too sure but I don't think the spring is part of the circuitry. It's basically there to maintain the right tension between the base connector and the bottom of the deck since the pos screw directly gets inserted into the hollow tube of the deck's bottom (yep, insert jokes here!).
Rechecked with Phil, the spring indeed seems to be part of the conducting circuit.