Hi Coach Eric,
Chances are this question has been asked and answered somewhere before. Forgive me, a little lazy to excavate.
In this clip, a really high hand prior to initiating recovery is encouraged: it is said to boost propulsion. It makes sense. You create more potential energy, which you convert to kinetic energy.
Is the the TI tenet of raising "just high enough,"to be interpreted within the context of going the distance? Is "really high" just for speed?
Nathan Adrian | Freestyle Stroke - Swim Technique: https://youtu.be/SONx52cyltI
Take your time in responding. No rush. By the way I got the snorkel like you recommended for the skate drills.