I wonder if someone could provide me some measurements off of an 13' OldTown w/c canoe. Mine is missing both seats & thwart, and I plan to make some over the winter. So... could you take some measurements for me? 1) What's the distance between the holes in the thwart - the screw-to-screw distance. 2) And what's the screw-to-screw distances for both seats. Thanks for any help you can give me!