Got a little tired of taking metal off my De Pews with it's difficult, warped edge. So, after using a Texta (magic marker) on the edge and analysing the effect on the Norton 4/8 (and compensating for the warp accordingly) I decided to add two more layers of tape and see what happened. I did more on the 8 (using the Texta to gauge the effect) and then a bunch on the Shapton 16k. I think it worked; at least she leg hair shaving test indicated it did. I'll know more tomorrow after the morning shave.