I am thinking of switching my mtb bike frame. The current bike is a 2005 stumpjumper disc (size 18). I am considering switching the components over to a 2003 Jamis Dragon (size 19) frame. My biggest concern is if my Fox F80's steerer tube will be long enough for the new frame. The current stumpjumper has a 110mm headtube and ~15mm of spacers below the stem. The Jamis has a 125mm head tube. This seems like simple math (and it should work), but is there anything I'm missing? Would I be able to use my same headset?