I asked Leon if he had a string for a Jack Harrison I had just purchased used off a friend, he shows me a 450 plus with the old fishing line serving ( can't remember what it's called ) I bought it, even though I was a little apprehensive about doing so, because once it breaks, it's gone, your not fixing it. I was using that bow for an upcoming elk hunt and the last thing one wants is problems with gear ! Once again Leon shows that he knows his archery, the overall performance of that bow was just fantastic, so much so that I must call him and order a string for a new to me Morrison Shawnee.
Moral of this answer, call him, he'll help you out !