On Mar 31, 1:29 pm, wrote:
May be of interest;

http://www.sexyloops.co.uk/cgi-bin/t...d.cgi?act=ST;f...

TL
MC

The CCS has helped me understand why rods rated for particular line
weights don't perform well with the prescribed lines. But I found the
greatest benefit from knowing the ELN of blanks prior to assembling
the rod. If I want to use a three weight line for a delicate
presentation, I need a three weight rod not one sold buy the
manufacturer as a three weight but with an ELN of 4.9.

Jeff Shafer