OK, my simple brain really gets confused when trying to deal with spine issues...especially carbons since they don't "call" them the same thing. Keep in mind, I am relatively new to this. I have a modern, glass lam r/d longbow 64" and 58#@28", which is my approximate draw length. My local pro has some Beman MFX (with the wood finish) that seem like they would finish out nicely weight wise...they are 400's. If I was to shoot approximately 225 gr. up front would these be close? I prefer to leave them full length for all the weight I can get. Any advice from the carbon gurus?