Here in New Mexico, and most of the places I normally fly, cruise altitudes are typcially 9500 feet and higher. It is a rare flight that includes altitudes any lower. If you are flying into/over many of the mountains here and up into Colorado and Utah you will be flying much higher. I therefore plan to include an oxygen system where I can mount a bottle when I need it, and easily remove it when I don't. Surely some folks here have a similar requirement. Where/how have you mounted your bottle? I'm just finishing my empennage and will be building the wings next so I have time to figure this out, but I thought it wouldn't hurt to see what others have done.