Phateye? Hey, if I answer your question, will you recommend a good visor to fit under my Protec helmet?
I think you found the one thing in the world that Riverbrain can't do, but I'll bet if you send a note to the site owner, Dan, he'll put it on his list of enhancements. You just want to be able to set a threshold value per run that generates an alert whenever the flow exceeds the threshold? I thought about feature myself, but I'm an obsessive compulsive flow checker, so don't find I really need the feature.
P.S. I believe the correct spelling is "gauge".