I had a wf4f sa gpx I bought supposedly new off fleabay that had developed cracks, rough spots right away - it was the old packaging (prob old and improperly stored) and I hadnt gotten around to returning it to SA. Found a new one, also Ebay, for $39 inc shipping, so I got it and spooled it up - Man what a difference!! My casting distance and ease of casting greatly improved, and I mean greatly. So all of you neophytes like myself who are casting with old lines (I have a 6wt line at least 20yo) do yourself a favor and put on a fresh line. So how often do you change lines and what is the secret to keeping it nice?