I'm not that much help as I cannot see us ever give fluids ourselves to little wiggle worm Filou. I only hope that all the sorrows to go with it will be a little less once Max is more stable. It sounds terrible but you get used to it and now - after 4 years- we only look at Filou's weight. His levels are far above anything- but when you come home he'll jump on your shoulder and purr up a storm.
Let's hope Max stays fine in weight and behavior for a long time to come.