Here is my newest mod, finalized, I think. The plane climbs faster, is stable up to 80% power. Once you give it full throttle it may barrel roll while maintaining it's heading. The glide factor is doubled. Try it out. The wing extensions are about 1 1/8". Of all the mods I've done this one is the best for glide and climb ratios. I am using a 30" silk ribbon on it.