Johnny V
First, that was not an ivory ferrule, it was LBM or another linen based micarta material.
Second, 400 grit paper will not remove any significant amount of material unless you really press hard, or you sand for a long time. Used properly, you won't see any scratches from it either. We do go finer with our cue shafts, but our ferrules are maple and are not as hard as the LBM material is.
Tiger does excellent work. I have seen there work first hand on many occasions and found absolutely nothing wrong with it.
I understand that many people have gone on rants against using any sandpaper on a cue shaft. Well, the fact is that used properly it is a tool that can positively affect on the outcome. If it is used improperly, it can certainly ruin a cue shaft.
You should go to there booth at just about any of the big events and just watch what Elio can do. I'm sure that you will change your mind about this thread.
Royce Bunnell
www.obcues.com