Tested, working directly without need to change your mechanical calibration.
Just open the machine, get the SD card, Open it in a browser, Edit user.ini and set the offset accordingly
So if you are using a form1 vat as the reference level you should edit the values to -4.5 for the MOAI FEP and +1.1 for the MOAI PDMS
Positive Values Make the Plate go lower, Negative make it go higher
I mechanically levelled mine to use Moai PDMS vats for that reason i’m using -5.6 on the photo album below
for more info check
the photo album