Did some measuring and calculating for the final overlay strands widths/lengths. The radius is timesed by 1.5 and divided by 12 to get the starting width. The length is the final length x 1.5. The short of it (with some averaging) is that each strand will start at 8 mm width and drop a millimeter every 24 inches to end with 3 mm. I'll probably extend the 3 mm by an extra foot or so at the end and use strand dropping to get the final taper as I find that my strands often end up being a wee bit too short.