The KeilKraft Gazelle (designed by Dave Platt) was a decent enough little model for sport/stunt flying - I built several in the 1960s, powered by 1.5cc AM15 diesels and flying on 42' lines. My best and last one was built with a thicker wing, 1 1/8" thick instead of 1" (i.e. 18% instead of 16%). You might also consider the FROG 'Talisman', another Flite Streak clone for 1.5cc engines. For .15 or .19 engines, there's nothing to beat the profile 'Peacemaker' that GMA designed for AeroModeller.