I had trouble getting a Trac-Com Chaser to stick to my helmet with the included velcro. This model is flat on one side and curved on the other. It is designed to fit my Stilo ST5 helmet (large shell size). You could probably scale it down slightly to fit the small shell ST5 or other helmets. I attached it to my helmet with double-sided Gorilla tape. It includes a slot to pass through a cable wrap which holds the Chaser to the 3D printed mount. You could probably just use stick-on velcro to the flat portion of the mount as well.
The author marked this model as their own original creation.