[sebastien murat]

Am no sir!

You wrote: "...to experience [stress] .... is something I hope to postpone till necessary".

Otherwise its not really stress, rather a controlled (semi-stressful) condition.

In dynamic and static: my recommendation is to not dive with anything on the face, but most can't handle that. So, my suggestion would be just before you're about to surface from any taxing dive, i.e. at least a good 5-10" before.

Seb