I need to cut a very thin kerf about 3/64" in various shaped woods. They are oval, round and rectangular. The wood is 5/8" to 3/4" thick. The kerf has to be in the center of the edge. In other words as the piece lays flat I need to cut the kerf (groove) in this edge all the way around. I don't know a thing about routers but I am handy and will buy what is needed. The kerf is used by basket weavers to insert the reed to start making a basket. Thanks for any advice. Vince