FYI One can turn some CPAPS (like mine) into emergency (only 20 Psi as opposed to 30) bilevel just by attaching to a $20 timer from amazon Loop: N seconds on, M seconds off. That leaves the issue of filtering the output. Dont over think un-necessarily.

Maximum comfort. A Lazy Boy recliner is what I have been using to the past 2 decades. In front of 3 or 4 30" monitors. Pros: A recliner is vary easy on the back. JT

Our collective Infrastructure blind spot and a collective blind spot of the W3C Is that the HTML Scholarly Link is missing. An obvious web/learning infrastructure item is missing. Simply: A link that shows the original quoted material highlighted IN CONTEXT. Why can we not create HTML QUOTES that point to original quoted material? Books have had footnotes forever. Why not the web. Why not , goto page then search and hilight? We do this all the time by hand. This footnoting mechanism is how knowledge was built in books for hundreds of years. Why is something this historical and powerful still missing from our web? Why is something this important and easy to implement still missing? Out of sight, out of mind. Wakeup W3C - The HTML Scholarly Link is missing and you can fix it! Now is your chance peoples, make the W3C make it happen. The Scholarly Link an idea whose time has finally come, again?