Hi,
The sprayer is 28m, I do headland of 28m, Uturn distance from bonds 14m. But I’ve got always an offset. Why ?
Does this offset only occur at headland? Sounds like that as you give so much info about the headland parameters. If the offset appeared elsewhere too, it could be the WAS calibration issue.
Only on headland
Do that in simulator mode to. Why the dotted line is not on the green line ?
It’s closer if I go up the turn radius in vehicle setting
The last photo explains it to me. I wouldn’t call it an offset issue but now I see what it is.
The uTurn settings don’t make sense to me, it’s trial & error to get them correct. Also, 1m increments aren’t fine enough to make it drive in the headland tracks.
Ok 
Maybe one day