Flow Path + Local Rotation?

[pixl]

Hello:
I am animating a dolphin by deforming it along a motion path using flow path.
I want to rotate the dolphin along its main axis as it swims along the path.

Before adding the "Flow Path", I can rotate the dolphin on the path animation by changing the "Twist" channels of the motionPath, but the rotation stops working once the "Flow Path" is applied.

    According  to the Maya manual:

"The lattice created from a Animate > Motion Paths > Flow Path Object will ignore effects introduced by any motion path orientation markers. To enhance the front, up, side twist of a path animation with flow, animate the rotation of the flow lattice rather than using orientation markers for the path animation."

However,  I've tried this for both the object and curve lattices and have had no luck. In  both cases, I changed the rotation values of both the Lattice and the Base.

Any suggestions?

Thanks.