Went to an Outfitter in Fredericton to pick up a 5 WFF line and salesperson suggested that I overline with 6WFF. The line was on sale for $50.00 and I thought why not. When I got home I found out that The Sharkskin line I picked up was actually already 1/2 line weight over already. Anybody have any experience pairing a St Croix Imperial 9 ft 5 wt rod with 6 WFF Sharkskin line? Should I put it on my old 7 wt Fenwick instead?