Below is a composite of the first two pages. There are pages of expanded charts and text, which I could post if it would help, but thought I'd save space for now. I gather that <88% seems to be the point of concern, and I'm not sure how significant it is to be there for 20 seconds, and then an additional 8 seconds spread thru the other events. I've seen a comment by JohnBFisher that desat events even above 90% can be significant, and I have 136 of them total. My sleep study in May listed a low of 84%, but there is no duration listed and the chart is pretty small and hard to read. I've tried to read up all I can about interpreting these results. I can't find real info about how to interpret duration vs %, what all the desats above 90% mean, and the fact that the only really flat line is about 1/2 hour long. This forum is my best source, so any comments would be greatly appreciated

Since my last posts, I've started using a chinstrap, which seems to help with the leak rate, and definitely lowered the Systems One's recorded AHI. I'm still averaging AHI in the high teens, this week one night at 12 and one at 25. This is the chart from the night in question-

This is all in the context of trying to work with my understaffed local sleep center. It sounds like I'll have to go through all the intermediate steps for them and the insurance company as I aim for an ASV titration. The DME took one look at these results and said the time below 90% wasn't large enough to qualify for supplemental oxygen. That was Thursday, and there's no one in the sleep center until Monday, so I'm waiting to hear what the doctors think.
A few other things to mention. I've been traveling a lot over the last few weeks. I drove 12 hours to Jackson Hole WY, 300 ft lower than my home in Durango, CO. That night I slept almost 10 hours, which I haven't done for years, with an AHI of 1.2. I felt rested in a very unfamiliar way. Two nights later I didn't sleep more than 4-5 hours, but had an AHI of 3.3. I still felt great, and spent two hard days cutting firewood for a friend. These two nights are unique since my treatment started. The other nights there were more like my usual. I also spent 8 nights on a houseboat at Lake Powell, elevation 3650 (my home is 6500). I took with me an Everest3 cpap, with only compliance data capabilities. My nose had been developing sores over a week prior, and after the second night was bleeding a little. I didn't use the machine for the rest of the trip. I felt great, did lots of hiking, and didn't feel bad until I spent my first night at home with no machine. I'm back on it since that night, and feel better, but I'd swear the thing that really does the trick for me is an hour of good exercise each day. Maybe it oxygenates my system enough to overcome the effects of less than optimum treatment to this point. I've been considering that all this might lead to moving to a lower altitude. I know it's my health and I may have to do it, but the magnitude of such a thing gives me pause.
Any thoughts about all this would be a big help. Thanks in advance.