Quick question - how do you remember and record your times for your posts above? Are you holding everything in your head until after the workout or are you writing notes down every length or lap?
I've always been challenged to find the best way to record data. I ended up buying a waterproof notebook off Amazon, along with a pen which writes on wet paper, and leave these by the pool edge to jot down my SPL and times after each lap.
Is there a better way?
I have a Finis Swimsense but that doesn't let me easily review lap times and its counting is only one arm strokes versus two. It's OK for reviewing afterwards but doesn't help me within the workout to see if my efficiency is changing...