Last job is to balance the carbs, and I can't seem to get it right

[tommyardin]

their is a calibration adjustement screw on them no need to take them apart

Same as that, mine also have screw on each gauge to set the needles to the same parked position.
Still not used mine, had them over a year but my old girl is as steady as you like on tick over, starts first prod of the button with no choke every time, and just a touch of choke if the temperature is close to zero, not that I ride the bike then. Never checked the wotsit valve thingy on the side of the carbatooter, needle on rev counter is steady at tick over. So the old adage comes into play 'If it ain't bust don't fixit'  :lol