Profile is important but not as impportant as a "Scary" sharp edge from tip to shoulder. A very fine neeldle tip really isn't that necessary, they are fragile to produce, to carry and most likely don't aid in deep penetration. The best cross section is a double convex profile thicker in middle and feathering out to thinner sharp edge. Edge work is the real difference between a good head and a great one. Tease off those finishing flakes to provide a succession of sharp edge to next sharp edge. Two guys that helped me alot were Norm Blaker of Michigan and Larry Bodnar of West Virginia. Norm was an excellent hunter and took many Deer and Bears with his heads. He had a neat trick of using his thumbnail to put the last fine serration on his edges. By the way, the fellows who have shown you their points have their act together. Hope this helps. PERSEVERE.