@ SesameCrunch Thanks I used a box cutter with new blade. I when nice and easy the first few passes to get a nice groove. The tape helps get provide a pattern to follow. Once one side was successfully cut off I used the removed section as the pattern on the other side. I did this because I realized after the first side was removed the tape on the other side was not exactly the same pattern.
@ CliftonGK1 Thanks I butchered it before ever mounted it and this is my first Brooks so I had no idea it it droops more or less than non-butchered. My hypothesis is that the Swallow has a similar shape and doesn't droop. But on the other hand why add it in the first place then? Maybe to prevent chaffing? Either way I love it. I'm totally sold on the leather saddle thing.