Hey Stu, for the RPM meter (tacho) its just come to my attention that i've been hitting fuel/ign cut even before i've reaches the Redline or RPM cut limit on the ECU.. but when i rechecked on my ecu reading, the rpm on the tach was lower than the actual ecu reading and even my defi VSD on rpm shows the ecu correct RPM while the oem tach does not. and the higher rev u go, the more worse RPM difference it is. i've tried adjusting the ECU duty output (HALTECH ECU) for the tach but does not response to any changes ive made. over the years the settiings on the ECU was spot on while tunning (Tach and ECU rpm reading was on PAR). can it be fixed?