Autocenter fails after EQMOD meridian flip

Thanks Ken. As per the instructions I cleared out the model from EQMOD beforehand, sync data (DxSA and DxSB are zero)
After the flip the sync corrections are active again because SGP performed a plate solve and sync just before the slew. Could this explain what happens? If so, is there anyway of stopping SGP from syncing before the slew - but still have it autocenter after the slew?