Got the decoy today; it's better quality than I expected. Comes with 2 sets of wings, one for wind mode, another for pull string mode. But I do see 2 short comings right away:
1. The string supplied isn't great; it will certainly break pretty quickly. I'll replace it with something more robust.
2. Pulling the string rocks the mounting pole and it's bound to fall over after a few tugs. The problem is the string pulls almost perpendicular to the pole near the top. That exerts a large bending moment where the pole sticks in the ground. I need to rig something so the force of the string reacts straight down, parallel to the pole. Maybe an eye bolt.
A couple small tweaks and it should work just fine.