After many attempts at sharpening with stones and the Edge Pro, some very successful and others not, I thought I would try the sandpaper/mouse pad approach, which many on this forum favor. It has worked spectacularly with some of my knives and just OK with others. Trying to figure out the variables. I was wondering what thickness of the mouse pad people are using and if anyone thinks this is important. I have seen mouse pads from as small as 1/16" to 1/4". Surely, the thickness of the mouse pad must be important. Maybe one thickness is better for some knives and another thickness better for others. I will say that, overall, there seems to be much less precision necessary using the sandpaper/mousepad approach than the stones technique. I REALLY have taken a knife from just barely cuts paper to hair whittling sharp in < 1 hour. I'm not able to do anything like that with stones.