I remember also attempting this in May when my goal had been to crack 360W but when I had failed and ended up with 350W. However looking at my heart rate from that session I wonder if I really tried. 27 in Suffer Score and 15 Points In The Red.
Today I managed a 373W average. The H/R analysis looks like this. 33 in Suffer Score and 24 Points In The Red.
I guess motivation is everything