ORIGINAL: Lnewqban

I agree with the previous posts.

My opinion is that the description of the text is correct.

Although less efficiently, that device follows the principle of the LE slots, which accelerate the airflow over the top of the wing.

However, the area that the device covers is too small to generate a substantial improvement.

Besides, there is a strong circulation in the wing-fuse intersection, which generates drag, but energizes the airflow enough as to delay the stall by itself.

You can try it, but don't expect spectacular results.