Dear ISODAT 2.0 users I am using MAT 253 with ISODAT NT 2.0 with service pack 1.39 installed. I have been very frustrated with pressure balance for dual inlet, and I am soliciting some inputs now. I am typing in numbers for bellow percent but it often misbehaves. I have never worked out with automatic pressure balance function because it keeps overshooting; I can do much better job by manually. A pair of triangles under bellows do not work at all. I was recommended to try new service pack but am not sure if it comes with some extra that cause other troubles. Any inputs from you will be the most appreciated. Many thanks and have a nice weekend! Shuhei -- Shuhei Ono Geophysical Laboratory