Notes
Getting better.
Discovered that putting the pull buoy below my knees forces my legs up, so my angle-of-attack is improved.
Also, realized that a big part of my breathing problem is that I wasn't exhaling completely, making my breaths shallow. I changed from breathing every 3 to breathing every 4, and it was much better.
Reduced my resting time at the far end of the pool. Did 3 more or less "continuous" 50s.