<HTML>In a message dated 1/12/2002 9:52:03 PM Pacific Standard Time, gnewell@ameritech.net writes:       Gregg writes <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">.     I thought that tongue and groove might be a good idea long before I heard about it here. Lately I've been day dreaming about finger joints. Any feelings on how that might work in a soundboard situation? It seems that a finger joint would offer more surface area than a tongue and groove. Call me a ponderer.     I would love to here from </BLOCKQUOTE>             Greg -Finger joints will not work. Even the tongue and groove joints must be positioned towards the bottom side of the panel so that they are not exposed while diaphramizing.         If you've not ever tried to make a straight line over large lengths of wood then I must tell you how difficult it is even for the best woodworkers.       Dale</HTML>