I relies that this assumption is wrong "If the sign of Heel was wrong I guess I would get Leeway to Windward, which I don't do."
I will double check the sign off Leeway.
But I am still quiet sure there is something else affecting, because largely changing the Leeway index did'nt affect the size off drift. And as I said before got same values on Set and Drift from Exp as froms Instrument system, which is not Leeway compensated.

Can I change sig of Sensor values i Exp. is it by putting negative Leeway coeff.?

As ZZ said, make sure you have heel. If it is missing, leeway can't be estimated and course = heading.

The standard senses of heel/roll and leeway are such that they are positive on port as it is a roll to starboard and the leeway is clockwise.

Can't you just enter a negative K factor in Expedition?

barne wrote:

With a Nexus system, I guess it would be tricky to change the heel variable. If it’s not to hard to mount the heel sensor opposite to what it is, then that would solve your problem.

Would be glad to don't have to rotate the sensor

Can't I just put in a negative Leeway coefficient to solve the problem? I guess heel isn't used anywhere else?

I don't have access to the boat until ORCi Swedish champ. in August, so I will try it out then.