[wamnram]

Please don't feel bad about asking questions, that's how we learn. Yes, very simply put, flow is flow. We don't care if river water flows from mountain to ocean or ocean to mountain, it's still just flow. The problem is that some instruments have been designed to measure the flow in one direction only. I have to run some errands so will be gone for awhile. We can discuss more later if you wish or maybe someone else can chime in.