As many have noted, angle is what it's all about when putting an edge on for certain purposes. The Lansky and Smith's angle systems are inexpensive ($30-$50) and allow a razor fine filet knife or a more durable edged work knife to be perfectly roughed in and finish honed in a couple minutes. I've had the Smith's EZ hone system for a few decades and it's foolproof. Their new version eliminates having to rotate the angle guide to each side of the blade, making it even more convenient.