G13 support is now tested and functional in Inner Space build 5011 (buttons only -- including joystick press, but not joystick movement, which can still be configured via the logitech profiler). Still need someone with a G19.

X-keys device support should be functional for any new X-keys USB devices as of build 5011, but I don't have confirmation on that. Older X-keys USB devices were already supported.