The surge, I have no idea whats causing it but it sounds like a vacuum leak. As for the hanging RPMs at shifting, our throttle does have a slight delayed response. Unlike cable throttle cars where you press the clutch as you let off the gas and the RPMS immediately drop, ours you let off the gas, then you press the clutch about half a sec to a full sec later and your RPMs will drop normally and won't hang. Atleast that's what I learned with mine lol.
By the way, clever forum name but you've already Z'd yourself
