[fpernett]

Hi Simon
I'm one of the guys blessed by nature. I don't remember exactly when I learned BTV, but at 15 years old, I was diving that way. I have found that teaching this technique is very difficult. In front of the mirror I don't see any external movement, but with my mouth open, I can see that the soft palate and the uvula, move slightly upward while doing the BTV. You should hear some crackles in your ears while doing it.
When I'm going down I repeat the movement many times, and that had become a way to measure my depth and also for timing. I think that in the first 15 meters I make the movement every second.
I can go to 40 with normal BTV, but after that depht I need to do a mouthfill, pressurize the mouth and then do the BTV again. I can't say that works on 100% of my dives. The ears has to be perfect and require a lot of care to keep it working on a busy freediving season.

BTW, congratulations again