Congrats on your decision to step up to wood arrows. My guess is that you are going to be underspined, esp with the heavy head. Cut a couple of shafts to 29", this will give you a 28" BOP arrows when tapered for nock and point. Fletch them up and shoot the arrows with 125 and 160 gr field points to see which fly best. If your 50-55 shafts prove too weak, let me know and I can send a couple of stiffer shafts for you to try. Do you have the tools for making the nock and point tapers?