I joined last week. Love your sight. I'm an American but have learned more from you guys. I use oxygen most of time but do a lot of treadmilling. I love to keep moving and it took along time to get used to caring tank on my back.when you're told you're dying I've found a sweetness in day to day living I'm 66 and must make 5 years for my 50th wedding anniversary. What has. Been your experience with portable oxygen generators for distance travel.