Setting electric brakes

[Rothe23]

I'm new to using electric brakes on my fifth wheel always used surge brakes with my boats what is the best way to get the correct gain on the controller thanks

[MidMOTraveler]

How I was taught, get load rolling 5 mph shift to neutral using controller activate slowly till trailer only is breaking . Use that # as starting point then usually adjust up a little depending on weight.
What you want is the trailer to do most of the breaking without locking up.
We’re pulling 15.5k and Fords controller is set at 8.5