Instead of drilling two holes for each cord loop for anchor points for the bag cage, you can also drill just one. Then, simply run the cord in/out through the holes in one long strand, and slip the cage cord under the inside parts of the cord in such a way that tension keeps it up against the holes (a zigzag pattern works for me). It leaves cordage showing intermittently on the outside of the hull - but, who cares? I'll have to see if I have some pics of the Prospector rigged this way.
Glenn - I like your bucket seat idea. Any current source? I now have a Mad River Guide that needs outfitting, and I think all of this thread is applicable. Also - where are you finding neoprene stock?