I got my seat belts from Tuf-Tow and decided to play with them a bit. The vee for the 4-point harness that goes above the shoulder is completely retracted into the inertia reel and doesn't work well at all. Also, the rear spar carry through is not the ideal location for the installation. The belts are too vertical to provide optimum protection in case of an accident. I'll have to noodle this one out.