I would like to now if a fly rod (sage 8 wt) is the same as a single spey rod (sage 8 wt). My question is; I'm going on a trip and have to limit my gear, could I use my fly rod (sage 8 wt 9'6") with a windcutter 9 wt line on an extra spool for single hand spey casting. or would this just not work, fighting my self wile fishing wasting my time. I would like to bring all of my rods and reels but I can't, so I trying to fine out which rods and reels to combo up on. To fly fish (Dry) and spey fish (Streamers) (((this maybe a bit heavy for where I'm going, so: same question only with a 6 wt fly rod/spey rod))) NO NOT THE SAME LINE BUT A 7 WT LINE ON THE 6 Wt Rod. The Real Question is does spey line work on a fly rod. Thank you for any input.