Have a blob for the effort at writing these stories down. Well done

.
What are you thoughts about de-inverting tanks? I've had them both ways, and have a preference to have the valves up. Avoids the need to put extra weights anywhere, and enabled the use of heavier fins.
Hypercapnia in a cave

... scary. Advice about cheap sorb taken

,... but not followed

last time I visited PDC. That penny pinching silliness

won't happen again.