My fix was drill 4 holes and U-bolt. Easy, fast fix that can't fail. (hehe, I hope) I face planted real good and had a sort of a blood blister the size of a softball and later a baseball where my ribs pinched the flesh against my hip bone for months. Really important we let new folks know about this over and over. (sorry about the graphic)
Have this set up on a springer. Not that it has to, but could rotate. I used muffler sealer and double nutted. Where ever possible I put the bolts, bolt down with the nuts up and visible so I would hopefully see if they vibrated loose. So far, so good. http://motorbicycling.com/f11/fender...fun-23421.html
Having fenders again, took me months to brave it again, is great! Go ridding on days with out em, ya wouldn't.