Use all the bags!
Yes, pull the water out using paper towels thru the provided 5micron "drying" silk screens. Then chill the patty. Then grate it thin, let it dry in a cold dehumidified room.
ALL 8!!!!!!! Or 7, or 6 depends on how much trim you have. I just use a 38, 73, 120, 160, 190, 220...