Yesterday, I was blissfully making beads, minding my own business, when I heard an explosion that made me jump! It came from my oxygen concentrator, which then started grinding to a halt! I have (knock on wood) NEVER had a problem with it before, so I guess I was due! My friend Jason came over and figured out what was wrong with it (heat exchanger), ordered the part for me, and helped me set up the oxygen tank that I used to use before I bought the concentrator. There was some oxygen left in it, but alas this afternoon it is almost gone. I was hoping to get some enameled head pins done and may be able to tomorrow. The gas place is not open over the weekend, so I'll have to have fun (?) instead. Saturday consists of driving children all over the city, and Sunday I'll be at the Steeler game! Luckily there was enough oxygen for me to finish the order I was working on when the concentrator blew up! Tonight I'm going to take my son to see my daughter's high school pl...