Hmmm? How thick is the bow at the knot area? My gut says to keep that area of the knot stiff and since its right at the point where the stiff tips should start you would end up with a very long stiff tip. Then I would want the other limb to match. So I would end up with16+ inches of tips not working. Therefore, I would shorten the bow to bring that knot up into the range of a normal stiff tip and, depending on wood type, either back the bow with a stiff handle, make the handle work, or back it and make the handle work. I don't know that wood type, but since its not osage and since it has the crown I would stick to my plan of making a 64"-ish bow.