Fender skirt questions

I have been through two sets of fender skirts on my Keystone Passport. Poor design in my opinion. The dealer replaced the first set after they broke only after a few hundred miles. When the second set broke the dealer advised me that they would not replace them a second time. I ordered a set from the internet. I made the skirts more rigid by using one inch iron strap. I also used threaded screws with rubber washers to help absorb the road vibration and lock washers on the back sitting on a flat washer. So far so good. I hope this helps.