[Kars]

Chi, though I think everything is mentioned here already, I would like to emphasise the need for flexability. Not only in diaphragm, chest, but also in Eusteugian tubes. I don't know if you can do hand free equalisation, but if you can it's truely a blessing for deepdiving. Not only for performance but mostly for the enhancement of the whole experience, it feels so much more natural and relaxed to be abl to do BTV all the way down...

As for reaching new depths, attitude is also important. A will to force yourself down will tension up everything that in returns cost a lot of O2 and will prevent you being able to equalise at depth.

I don't think you will have any trouble reaching 40m. Actually with the time you have I expect you can really learn a lot and go easily beyond your 40m. The 50 is magic, well capture that dive on video because you're likely to remember and want to relive those beautifull moments.

Love, Courage and water,

Kars