two winglets for LIDL glider version2

They fit perfectly to the tips of the wings and do not prevent (pre cut) ailerons to move.

To get enough strength I printed them with 2 perimeters, 0% infill, 0 bottom layer and 0 top layers

Note that If you want lighter print then use a single perimeter (or spiral vase). This may need to scale down just a little the models.

Don't print them in PLA or they may not resist to sun in summer... Prefer PETG or PET.
They print vertically without supports

Prusa

i3 MK2S

No

No

.3mm

printed with PET "bottle filament" : https://hackaday.io/project/185196-pullstruder-from-plastic-bottle-to-pet-filament

2 perimeters
0 bottom layer
0 top layer
0% infill