Quote Originally Posted by crouton976 View Post
What is this app you speak of? You certainly have my interest piqued...
I guess the general theory is that if you hone with no tape the spine wears the same as the blade, spine width shrinks and so does blade size so the geometry should remain the same. If the spine wears more over time you might wind up with a wide bevel. To compensate for excessive spine wear and to get a narrow bevel back layers of tape are used to get the geometry back and a narrow bevel of about 18 degrees. This is just my guess not having had too much to do with full hollows with excessive spine wear. I am thinking that using the Excel app here http://www.coticule.be/wedges.html you might be able to get that narrow bevel back. Like I say this is just a guess. It seems to work on wedges to keep you from shaving excessive amounts off the side of the blade and an excessively worn spine compared to blade size on a full hollow may start to mimic what happens to a wedge/near wedge honed without layers of tape. I hope I am not being clear as mud about what I am just supposing.

Bob