Purchased a lovely new set of leather seats (MX5) plus the runner conversion kit from Paul Bishop. Basically, you remove the old seats and runners etc. Using the original captive nut bolts, you fix Paul's conversion in exactly the same position, but at right angles to the originals. Struggling with the kit. The original runners are fixed into the floor, in line with the seat sides, all easy. Pauls conversion goes across instead at right angles, but unfortunately falls slightly on top of a pressed floor ridge at the rear tunnel side. Has anyone had a similar experience with this kit & how d