More progress... Top is glued on and the first coat of epoxy applied to the glass. I decided a 1/4" radius on the edge wouldn't be too bad and only a little of the inner veneers show. The glass wrapped around the edge with only a little fiddling and dart cutting. After sanding and a second coat, the glass cloth should almost disappear.
I weighed the partial box again and we're up to 30 lbs. Not too bad, tailgate and hatch cover to go.
I tried it on the trailer frame and put the included fenders on top of the tire to see how it looks. I think I should look around for some different fenders. I wanted to make little wheel pants like a small plane, but I'm just outa time. Anybody got a suggestion for light, good looking fenders?