Ok, let's see what pops up here. I don't think Bob want's to get into arguments about this so it might be best that others try this stuff out and report back. The Traeger Book has this stuff in it mentioned in several places. He says that even an old Italian Bass can benefit for it so I have to take that as a real possibility.
For me, I don't know really how this is done but I did read thru some basics about it in his book. The problem is that I like my Scrolls/Gears as they are and also a good healthy fingerboard.
Hey, if the Bass don't sound so good I pick a different one out of the rack..