Originally Posted by
gssixgun
If you Bump along it doesn't tell you what you need to know..
You also dull the edge un-evenly it also can't find rough spots evenly..
The TNT tells and does much more than just showing a sharp bevel in spots, that is why one long evenly drawn stroke across the wet thumb nail is in the description..
Your bump method will work, but it lacks all the info and effects of a true TNT
The TNT can find and smooth rough edges pretty effectively too, bumping or spot checking looses that..
Something to consider.. If it works for you that is what counts though, but I would learn the traditional method to glean the most info and benifits from it. I think that is what Jeness was also pointing out