Have a '90 K5 I use to tow a camper quite a bit with the family. I would like to install an overhead DVD with the flip down screen to be viewed by children in back seat. I know screwing directly into the fiberglass top is not good and was wondering if anyone had mounted one of these. I was thinking about maybe running sort of a "shelf" across the top and mounting the DVD to that, but I still have to problem of mounting the "shelf". Any ideas?