I have a spares of everything except the elbow that goes from the frame to the tube. A part snapped off inside of it 5 days ago, I live in a small rural town and I do not deal with a DME (I order most of my supplies on amazon), but this elbow was out of stock. I tried fixing it, but it would still leak air. I made due for 3 nights before a spare showed up yesterday. I felt like crap, my ahi went up to 3.5 from an average of 1.2, for those 4 nights. I can’t image having my cpap completely non-functional, so I have ordered two more elbows, and a used machine (dreamstation). I also have a battery backup with all the appropriate wiring. So please keep spare parts handy for your system folks!