Well, exactly 1 year later and recently both brackets popped right off the fiberglass while I was loading the kids bikes into the trunk. Turns out the Liquid Nails adhesive I used has become all brittle and failed. Adhesion wasn't a problem at all - the adhesive failed, leaving adhesive layers on both surfaces. DOH! This time I used 3M 5200 marine adhesive, which is supposed to stay flexible instead of that LN crap. I'll post some pix in a little while.