I have no idea how my almost 8 year old post got bumped but I was asked to say how it turned out.
He marched that year and two more. He did great and loved it. A herniated disc kept him from marching 15-16. He made a top 12 in 17 but dropped when they went to all euphs. Trying a euph in14 is what caused the herniation. He is a baritone but switched to trumpet in14 because of the disc. He auditioned his age out year at Crown and self cut after two camps because his heart wasn't in it to give that commitment any more and his back was botheringhim a bit.