Yes, I thought the same.
I think itīs not very effective. During cruise I moved the rudder trim control wheel to the right and I didnīt notice any change.
But, during the flare at a speed near the stall, I noticed a nose tendency to the right. The wind was blowing from the left. So, I think that maybe it could be effective at slow speeds...? It doesnīt make sense aerodynamically...
Thanks