Everbody seems to have a spin on the same concpt. Here's mine:

I used a 2 1/8-inch diameter hole saw (from installing door locksets on my house) to make four 1/8-inch thick 2-inch diameter disks with a 1/4-inch hole in the center. I then flattened the barbs on the tee-nuts and pushed them through the holes in the disks and epoxied them to the disk. The stem of the tee-nut did protrude through the disk so I counterbored the bolt holes in the Keeper rails just enough to accept the protrusion. After the epoxy cured, I screwed the tee-nutted disks to the Keeper rails and filled the bottom of the threads of the tee-nut with beeswax (from a toilet seal also left over from remodeling) to the bottom of the bolt using a tooth pick. Beeswax is a great bond breaker so I was careful to only get it only in the threaded hole. After buttering the bottom of the disks with thickened epoxy I taped the rails into position on the inside of the hull. The epoxy was thickened enough to fill the gap created by the curve of the hull. It worked great, no problems to date.