That's cool, thank you Adamw, is it possible I misunderstood and it was VTEC that is best on a half bridge, not VTC?
Would that make any sense? I was pretty sure VTEC is a straight up "on/off" solenoid going by the stock harness. On the stock harness both VTC solenoid wires go to the ECU instead of just one of the two wires from the VTEC solenoid. Is it maybe just a weird Honda thing?