Servo Connection Loop Arm

This arm connects to servos like the Hitech HS-311 that comes with Hummingbird Duo kits. There is a hole for the screw, but you may need to clean it out a little with a drill in order for the screw to go in easily. See the video for this and other prints at work with Hummingbird Duos.
https://www.youtube.com/watch?v=w3YVETXvG4g
https://www.youtube.com/watch?v=UwiK0_OFjK0