Below is the video in question for installing the shelf. Just make sure you round off the back corners of the shelf to accommodate the fillet between the bulkhead and camper shell. The 4 holes that the shelf slot into also needed some cleanup from epoxy drips. I opted not to install the fiddle rail so hopefully this process works for those with the rail. No additional sanding on the shelf was required for me to fit it in place.
https://www.dropbox.com/s/w8z3zm4yd8h1hw0/VID_20180328_212408356.mp4?dl=0