We already have club seating and the Seneca doesn't have A/C. That being said, my wife doesn't fly with me anyway. She gets no benefit from the plane unless we can fully overcome her motion sickness issues.
So I've never done oxygen. But if I made the Doc Bruce DIY system, couldn't I put a humidifier inline with it to help? Has anyone tried that? They sell humidifier bottles for concentrated O2 medical setups. Surely this could help.
I am a lot of cross country. As an example, here are the tach time entries per leg from my last bit of flying:
4.3 - solo
2.1 - solo
3.3 - 4 people
2.8 - 4 people
1.7 - solo
1.2 - 2 people
4.2 - solo
4.3 - solo
All of those 4's are more than 600nm.
I was going to buy a 911 but my dad said I can't because I already had an airplane. I mean, am I limited on purchases in any midlife crisis? Just spend it all!