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@ewanmac
First TT of the year tonight, on the local H10/18 course. Turns out that I've only successfully ridden it with a power meter once before, although it's also the stretch of road I use for my own CP20 testing.
Last year I did 24:00 with 284w (winner was 22:15). My most recent CP20 test on that stretch was 8 weeks ago and gave me an AP of 276w. 20mph headwinds on the return leg suggest I probably won't go sub 24minutes, but I'll be happy if I can hold around 280w.