> Just saw Norm using a plastic shelf support boring jig with a self
> centering drill bit. He used it to make adjustable shelves.
> where I can get one or something similar?
Don't have a clue, but his jig using 13 ply birch, based on a router
/W/ guide bushing and 1/4" up spiral bit works quite well; however,
his hole layout techniwue sucks.
See Fred Bingham's book for a better method.