I'm gradually increasing my use of the paddles and today managed 5 sets of 67 metres each. As mentioned previously, I'd been advised a maximum of 100m per set but in the first week I don't dare try that for fear of a shoulder injury. Now I expect that I'l get there in a few weeks. Currently I still felt clear shoulder fatigue immediately after each set (good) whereas last week they felt tired a day later too (maybe not so good).
For the last few swims the data recorded by my watch has been much more accurate than in previous weeks as I've done clear push-offs and ensured that I paused my first stroke briefly.