#3 My chef knives are developing a wave in the blade near the hilt. what is causing that?
You ask a good question. A wallow can happen if you are using full power when sharpening, instead of the Place-Power-Pull technique in the instructions. First, load your blade into the guide and then power up as you begin pulling through, powering down as you come to the tip. If you have the machine running as you bring the blade down into the guide, you are exposing that part of the blade to twice as much sharpening as the rest of the blade, because it grinds as you come down and again as you begin pulling through. Double grinding in one area can create a wallow in the blade.