
Close the TBs completely and then adjust the balance mechanism so that both start to open at *exactly* the same time. open the throttle fully to make sure that all 4 plates are at the same angle when fully open to confirm they are in balance, it's often easier to see discrepancies when the throttle is fully open.
When they are balanced by eye, open the throttle on the adjustment screw by a small amount. Align the throttle pot using the M3D software.