Several rods I have cast or read about particularly the Winston IM6/WT are rated "faster" as the lenght of the rod is shorten, e.g., the Winston 9' 6wt is rated a medium and the 8'6" 6wt is rated med fast. Does this work with "all" rods and does it apply when incresing length say a Sage RPL+ 9' to a 9'6". Looking forward to your comments. Thanks Dave