I designed it to snap over the helmet itself which means it has to be pried open to fit into place. Consider your filament and wall count so that it doesn’t break. It takes a gentle but firm move to put it in place.
The author remixed this model.
Reduced the width to fit the Engage helmet dimensions. My original model wasn't organized very well, so it works but is not the cleanest very close in…
I use VHB tape to help keep it in position.