The 17 degree stick will probably be too narrow to hit the edge of the Sebbie. I really suggest you get a good quality strop from the site I mentioned before. With it, you can maintain the convex edge of the Sebbie, and keep the highly polished finish. You only need to actually sharpen your knife when you really use it hard without touching it up on the steel and strop. Be sure to check the quality of the steel you bought. If you can feel or see any dings in the rod, you can damage your edge. If the grooves (if you have any) are obviously visible, then they are really aggressive and actually remove steel, not something you really want. The ones from HandAmerican are as smoothe as glass without any defects, and the grooves are so light they don't remove any metal. A good 9" steel will run you about $20, and they come with a nice leather sheath that you can use to strop your edge on when finished.
Mike