The SPEEDLAB is a reduced version of gnuEASY, with some variations:
Removal of the profile number 12 (even simpler) Removal of all mylar reinforcements Leading edge improved with fiberglass rods Area reduced to 16 m2, then, very little consumption of tissue (46 ml) and lines (185 m).
Inexpensive, and easy to build...
It remains to be seen in flight ...!!!
1. Plans of the SPEEDLAB 16 speedglider here in image format (.png)