Throttle body balancing

Spent ages yesterday trying to balance out the air flow through the Titan throttle bodies, initailly they were well out with one pair sucking ~10Kg/hr and the others ~6Kg/hr at idle. A small change to the idle speed or balance meant that the idle mixture needed reseting on the Emerald everytime, in the end this was the best it would do, the results were:-Cyl 1 - 5.5Cyl 2 - 5Cyl 3 - 4Cyl 4 - 6Are these values ok?What would cause the differences?Overall would Jenvey’s be any better than the Titans?