Has anyone had to adjust the distance of the locknut in their forks? I measured both fork locknuts to be 17mm, but the manual states a minimum distance of 20mm or more between the damper rod top and locknut top. I'm concerned that my Rebound damping adjuster on the top cab is now just for show. I tried to move the nut by hand, then with a wrench, but it would not budge. Can anyone shed some light on the distance specification?