Sentania - lot’s of excellent info here. Enough for you to proceed with having the non-union taken down and an intramedulary screw placed. The one thing I’d recommend is to get moving if you plan to race next summer. In contrast to the acute course described by some STer’s, following this procedure most surgeons proceed quite slowly to avoid refracture,hardware breakage. I recently did a blog on water running which will be important to you that you might check if interested. Have patience in your postoperative schedule and you’ll likely do well. Good luck from all of us.