Ok, I guess I didn't measure the 21' right but will try again when I get home, I tried one with my 3wt and the turnover is just perfect, it doesn't spook fish at all! Perfect for carp fishing. The only part I didn't quite get was the one I quoted (sorry, a bit slow here). You mean when I twist the 21' in half then I tie another piece or 10.5' to it?