The Stradic MGF doesn't include the S-concept, but it does include a magnesium rotor. Magnesium is flammable; I learned this grinding a VW Bug tranny to fit a twelve-volt flywheel. Hook a hog with this reel and you can take the term "my reel was smoking" to a whole new level. OK, the reel most likely won't catch on fire, but it would be cool if it did. Check this link out for more S -Concept info and picts. http://fish.shimano.com/us/en/fishing/products/reels/s_concept.html