NecksGen

Slack Test: Get buckled in your car as if you are ready to race and look straight ahead to the horizon. Have a helper lightly pull any slack from the tether all to one side. Pinch the tether to form...

Slack Test: Get buckled in your car as if you are ready to race and look straight ahead to the horizon. Have a helper lightly pull any slack from the tether all to one side. Pinch the tether to form...