I had a great lesson today, even though it was straight after doing a mega weights session (300 kg leg press!!). We worked again on all of the aspects from the last few weeks (high elbows, the roll, the kick). Now I am using my legs more it doesn't feel such a hard slog through the water and, perhaps more importantly, I feel I have a more stable "platform" so I don't end up losing balance, compensating, compensating for the compensation etc.
At one point we did a quick test to see how fast I would swim 100m at what I perceived to be a "Half Ironman effort". Even with my crappy way of changing direction in the 20m pool, I did 100m in 1:32 which is not bad. Imagine if I were able to maintain that for 1,900m! Of course, as I keep saying, in the sea everything will be a different kettle of fish altogether. Probably the single most important thing I can focus on is simply looking where I am going.