Myself and Steve Lloyd were both low over Chrono yesterday, I would not take too much notice of it.
I know my reading was about 15 fps lower than it should have read.
I`m sure if I had got the end of my my closer as on our club pro chrono, I would have seen a different reading.
It passed and on a Gp day that's all that counts.
When I used 7.9 in the Ev2, there was no difference to note in clicks or wind drift from 800 to 815. Setting above 815 is running the risk at a Gp with the variable chrono readings!.