Congratulations, Grant, on your excellent results.
My results so far this far have not been excellent, but at least I have some results. Last year was more or less a washout due to a minor medical problem that almost completely prevented me from swimming. I managed one meet with dismal results - personal worsts in all events, but still managed to enjoy the occasion.
This year so far has been only slightly better and I note a severe loss of endurance. I had to switch to backstroke in the 400 free and 200 free, which didn't do my times any good. I wisely avoided the 1500 and 800, but hope I get back to swimming them when I have recovered some endurance, if I can, and I expect it is possible.
I have decided to do most of my work on improving the backstroke, which although slower than front crawl seems less exhausting. I have abandoned butterfly for the time being. Next meet is in June if I get my entry in in time.