I am looking to make a few sujihiki's but am a little unsure of the profile. I took the pattern off from a Masamoto that Salty has, he called it his "holy grail" suji. WOuld that be a good foundation to start from? I dont want to straight up copy anyone, just would like a few pointers about basic edge profile. Is there a flat at the heel? Also, i plan on doing a convex grind, should this be blended smooth?