I am wondering about the differences in casting distance of a 8/9 rod in three lengths 13, 14, and 15 feet. I would think each added foot in rod length would add a few feet in the cast. My next question is have 3 14 foot rods. A 7/8, 8/9, and a 9/10. The larger line size should add a few feet to the cast. Last spring at the Sandy Clave Juro had 3 rods rigged up with a mid-spey line. I could cast the 7/8 and the 9/10 about the same and the 8/9 was about 10 feet less. Possibility the line on the 8/9 did not match the rod as well. I remember in Jim Vincent's first casting video, he mentioned a rue of thumb. For every foot deeper you wade you would loose about 5 feet in distance. Do you guys think the 5 foot rule of thumb would work in the above examples? Jerry