Has anyone had any problems with th bolts that hold the passenger fooboard on a Ultra Classic Trike? I have had three bolts break and lost two footboards. The Harley Service people say it is caused from my 90 pound wife using it to step on the bike. The salesman asked how else is a passenger supposed to get on an Ultra Classic and the service manager had no answer. They say they have never had ths problem before. They have all fallen off on the road with no one even in the passenger seat. It seems as if a grade 8 bolt would be much stronger than that. I wonder if it is too brittle?