I've just done a couple close to the sheer. I scribed a line matching the sheer with a compass and then glued the rail onto the line. My clamps would reach down that far. The ones further down the hull will be a puzzle as I haven't figured out how to clamp them yet. the rails are only maybe 2mm wide and .5-1mm thick so bending them around the bow isn't an issue. I've been using one piece as my sections just go the length of the QD, the waist and the FC. The QD piece is just under 12" (31mm) long.
Does that answer your query?