By going to the 3 bar, though, you've lowered the resolution vertically. With a 2 bar sensor, you have 0, 20, 33, 45, 59, etc. With a 3 bar you have 1, 21, 40, 60, 79, etc. The numbers aren't the same. Fast keeps the same VE #'s in each cell when you change from 2 to 3 bar sensors, though...