During the first tests of the probe, a winglet effect was achieved on an Alpha 6. The winglet was neutralized by rolling it up.
There is little effect. Perhaps a slight improvement at low speed and probably a slight deterioration at high speed.
It’s on this type of wing with low aspect ratio that we expect the greatest improvement at low speed.

The conclusion is that wiglets are neutral for performance on this type of wing. They are, however, useful for wing stability.