i buy my line on ebay ,that 11 weight cost me twenty two bucks + shipping it is an orvis line,.,i use DT so i get two lines.
i am useing the 11 weight on an eagle claw featherweight seven foot rod,and it works well.
i have been fly fishing for 50 yrs. now and through trial and error found that this over weight line works great for roll casting in timber .
although i must admit that the 11 weight is about all the rod can handle it does work great for me.