Mapping the course does make the boat a softer pull. I have found without the course mapped the boat will do everything it can to maintain speed, resulting in a stiff pull
@h2o.nhk I would recommend that every time you use the course you map it. The pull will feel more consistent. As far as letter settings, this is really personal preference. If you are in to 32off, you should play with the settings. A setting tends to be a later throttle engagement, I think of it as the boat will gain speed at the second wake out to the ball. B is right in the middle, more white water to white water. C will start applying throttle right after the unit sees you pull. The numbers are the intensity of the throttle application. 1 is gradual, peaking near the end of the profile. 2 is a ramp up and down, so the high point is right the middle, probably the most mild. 3 is all the throttle you want right away. The best way to know what works for you and your style is to try them all and use what feels best. Obviously to change this you need to be in tournament mode, once you set this in tournament mode you can go back to Rec mode and the setting will be applied.
@MattP The rule about drift in a tournament is fix it the moment you notice it. The Chief driver will need to verify the boats are good. If it starts to change through the day you have to remap, but it is not a thing where you can get a re-ride.