I have come up with this simple version of theese "horribly"complex co2 tables that youre doing,and I was just wondering if it actually works.What I do is before i fall asleep every evening I lay in bed and then force exhale totally empty lungs no reverse packing though,and then hold my breath for 30 seconds then inhale full,no packing,hold for 30 seconds and then repeat.Can usually keep this up for ten, fifteen minutes before Im to dissy to count seconds.Any thoughts on possible simple improvements?