This makes me think he was bouncing from something overnight on 5/31. I liked using Lev, but one thing that always kind of drove me crazy is that the onset/nadir can be so late that getting a before bed test doesn't always give you an idea of where the cycle is going. With Lantus, the +4 would usually give me a good hint as to whether I needed to stay up or not. Still, it's worth it if it gives Willow cycles this good!