Mine is overdosing about a gram. VA sent me this link to set up videos:https://nuovasimonelli-my.sharepoint.co ... e64b032aa8
Video #2 shows the calibration step.
Interesting note on the calibration: I assumed that if the grinder was overdosing by 1.0g, then I would need to set the calibration compensation to -1.0g. Not so. You need to add 1.0g.
Also, the final weight on the screen is not the actual weight, or it's the actual weight plus the calibration number. But now when I set my double shot to 15.5g, the final reading is 16.5, but I get 15.5g out every time.
There is also a ramp feature that allows you to set how many .1s to slow the grind at the end of the dose to improve accuracy.