Steering torque

[chumbucket]

Crusher hit the nail on the head. While NFB steering is good, it will not correct steering torque. It will diminish the effects, but again, will not correct the problem.
Almost all boats will have a tendency to steer and fall off plane to starboard. It's generally caused by a couple of things such as prop rotation, driver of the boat on the starboard side (weight shift factor), etc.
The small zinc trim tab right above the prop is there to compensate for the steering torque. The angle of the tab can be adjusted very easily. Right above the tab, you should see some sort of cap (may be missing depending on the previous or current owners). Pop the cap off and down inside there will be a socket head cap screw. Make a mark or take note of the current position of the tab (some have degree marks. some don't), then loosen the socket head cap screw with the right size Allen Wrench. You shouldn't need to remove the screw unless you're changing the tab completely. Then just try varying degrees of angle change until the problem goes away.