This is a direct elevon servo actuator for the Flitetest Versa Wing. The actuator should be slowly pressed by hand onto the servo spline to cut the splines into the part. This part is useful for both left and right elevons. You should also use the screw that comes with your servo to lock the the direct actuators onto the servo spline.
I print this part with the flat of bottom of the part against the bed.
I designed this part in Fusion 360.