The LS-1 is 60" Slope Soarer was designed by the La Sierra Slope Soarers flying club in Riverside, California, in the 1990's. So the story goes, that during a club meeting, one member suggested the club should have it's own glider, something indigenous to their club and hill.
The idea was to keep it simple, and low cost. Something easily built, which doesn't sacrifice performance. Able to perform aerobatics for the seasoned pilot, but be stable enough for beginner aileron pilots.
The result was the LS-1, a 60" span slope glider with built up wings, ailerons, a simple box fuselage and solid wood tail surfaces, with ample room for radio gear. One story on the Internet tells how this design may have evolved into the Sig Ninja.
The LS-1 is a Complete Airframe Kit, so all wood components are included to complete the build.