Very interesting. Good to know. In your opinion should I also splice in my Zeitronix RPM signal wire into the tach adapter or just keep it on the ECU tach signal wire where I currently have it? The folks at Zeitronix seem to think that the ECU wire should suffice as the Zt-2 "is engineered to accept a wide variety of signals and interpret them correctly without issue"

Anyone have any experience with this same scenario?