Does the old style Arc FW's dated 2012 have a advantage over a new FW. I'm under the impression that the old style have 24* built into the keyway and the new have 32*. It shouldn't matter because I run without a key. I set my timing where I want. A kart got DQ'ed the other night over a FW dated 2012. Is there a performance advantage running the old style. Thx