I was checking under my '48 N.G. today because the right track seemed a bit loose,as I went under I realized then that my clamping bolts were loose so I tightened the track to as close as i thought was ther same as the left side for tension then tightened up the clamp bolts.So then I checked the other side the claming bolts were tight but then I noticed my adjusting screw/bolt head was once rubbing on the back side of the tire but doesn't now cause there is a rain groove(as I call it) now cut into the tire.Anyone know why this has happened? Do you think that maybe my adjuster screw/bolt might be bent?