[cdavis]

Hi Chi,

Looks like you have almost everything you need to make 40 m no problem and a bunch of very good advisers. I can suggest only one thing. Equalization will be different from your experience so far and may be a challenge. Below about 25 m, as you approach residual volume, things can get pretty weird. Practice will get you through most of it easily. Reducing residual volume will help greatly in equalizing and reducing the possibility of a squeeze. There is an easy way to do that, diaphragm stretches. Use the search function to see how. A couple of 5 minute sessions every day will almost certainly help you.

Good luck and have fun.

Connor