I just finished a 10ft. 8 wt. Dan Craft --- and just for fun, tried the "common cents" method of trying to figure out the "actual" line wt. needed.

An earlier 6 wt. Dan Craft Five Rivers cast best with at least a 7 wt. line. Still a great rod.

The 10ft. 8wt charted out to be something like a a 12 wt. rod. Although cast fair with 8 wt. line.

However, does anyone know if the common cents method applies to a 10 ft rod or only to 9 ft rods?

Interesting thread.