I have a client who is interested in a 24" x 36" aluminum sign that will be displayed very frequently from a swinging sign frame. He mentioned the sign will be "swinging" very often and will be exposed to harsh weather conditions with high winds throughout the year and wants the best solution as far as the holes on the sign so it swings freely and are strong so they don't get distorted or stretched by the constant "swinging" motion of the sign. If this were a banner I'd install some grommets and call it a day, but since aluminum is rigid a standard grommet press and grommets won't be able to secure properly to aluminum. Are their any grommet-sort-of-solution out there for rigid signs? I'm imagining a solution something like an earring where you insert one end through the hole on one side of the sign then on the other side of the sign you screw in the opposite end that has a hole in the center? Any ideas? Thanks