Moog messenger ‘0’ tune

MOOG MESSENGER ‘0’ TUNE

Does anyone have service info for adjusting pitch to match ‘0’ on the OSC 1 & 2 Tune Knobs. I have returned 3 new Messengers, and the latest replacement is mis-calibrated also! The NuMusic Forum is full of customers with the exact same problem. Apparently, their Chinese factory omits the oscillator tuning calibration procedure before shipping.

NuMusic, new owners of Moog. try to be helpful but are in over their heads with this, their very popular first new product. I need a service manual, or just someone to post the servicing tuning procedure. (not the user level front panel tuning procedure)

Eric Enfield