OpenTX 2.3.0 and up
Have Fun and Just Fly!
It will give the predefined MULTI models those extra menu pages that make them super easy to adapt and adjust to your wishes. See this youtube video for the install instructions, and this demo video to get an idea of its working.
Supports all (motorized) gliders with up to 4 wing servos, such as F3K, F5K, F5J, F3J, ...