I'm sure the granite plates will work well. I use oversize mouse pads. I can still observe there is a difference if I move my chair around to a new position or if I change air conditioner or fan alignment in the room. The Fx-120i is a sensitive scale but I take that as a good thing.
Too be honest, I am less worried about it's absolute accuracy than I am about it's consistency when I am loading up a batch of ammo. The FX-120i seems to do well, but I have my doubts that the Area 419 "accessories" I ordered after getting my V3 are helping. I would have a hard time recommending them to a friend considering what they cost.
