Forgive me if I screw up some of the terminology. So I've been practicing my sharpening for a few weeks and I was going to use the "coin tip" from this website to just provide a spot check that I'm pretty close to the angle that I want. http://www.chadwrites.com/knife-sharpening-coin-trick-magic-angle-finder/ To make a long story short, if you want a 15* angle you divide the height of your knife by 4 and then the spine of the knife should be that height off the stone. I'm an engineer, I'm sorry, my brain works well with math Anyways, as we all know, a common gyuto style knife is shaped somewhat like a triangle and the blade height reduces from the heel to the center of the knife to the tip of the knife. So in order to keep the angle at 15* when I get close to the tip the blade is going to be lying flatter and flatter to the stone, correct? Also, does anyone have any advice for sharpening the tip? This has proved to be the most difficult part of sharpening for me, I've had quite a few times where I've dug the tip into my stone.