have a 2001 nitro that came with trailstar trailer. I noticed that one of the pal nuts seems loose and wobbly. I was also wanting to replace the keel roller. Ordered the replacement 5/8 inch tiedown and pal caps but when I measured the keel roller it was 7 1/4 inches. Cannot find that size anywhere on internet. The bracket that the keel roller sits is a fixed bracket that is welded to the galvanized trailer so I cannot change brackets. Has anyone had same problem?