Had to replace the rearwheel on my 1100. (4000 miles-about right?) I can't get the nut as tight as it was originally- original marks from the mechanic are about 1/2 turn away. I've had someone on the bike and applying the brakes, but even then I just move the bike. Does it need to be tightened with an impact wrench? Am I "close enough"? I'd hate to have to load the bike up and take it to someone who will charge me to tighten it all the way, but I also wouldn't want to lose the wheel! Any suggestions?