great, seems you're on a TI-like Kaizen-way!
Just a tiny remark...
I'd take a breath for every stroke.
Hope, I do misunderstand. You should breath every second
stroke at least (same side), inhaling on the same side, take the other side when going back the lap.
Saw inhaling every
stroke only with Terry and Sun Yang and only in exceptional situations (in races just after or before the turn). Breathing every stroke seems to be a science for itself, when you won't run into problems with balance and streamline...
Enjoy your successes.