Kolibear
Assuming the Koliber wing is the same as the Rallye, the slats are not held out by springs. The slats will usually be extended after landing, but you can (gently) push them closed. If the seals on the air dampers are not in good condition (the air dampers are awkwardly located inside the wing, and prevent the slats from extending or retracting violently), the slats will move freely when you push or pull them.
The extension of the slats at high angles of attack is an aerodynamic effect. For precise details of how this works, I too need the help of an elder and better!
