on the matrix manfiold pressure is the left and rpm is on the bottom.. the manifold pressure is in the middle of two tuning points for example '73' if i want to change the matrix at '73' do i change the box valve numbers to the top of '73' or bottom of '73'? i think its the valves to the bottom? also i am adding extra fuel at 93-94kpa but there is only 73 and the next manifold pressure is 105kpa do i just adjust the matrix numbers at the '73' boxes and it will figure it out for me? thanks Michael 99gs HRC Stage IV 8-Injector Setup 2GNT Member #32