I succeeded with an adapter board like the one you describe. I placed a row of vias down each edge of the board, then we routed the board outline right down the middle of the vias. We did get some tearout of the vias, so I suggest that you leave a little more than half of the via when you trim the edges. Maybe put some pads on inner layers to anchor the vias better. Be sure and use a mild flux. Wayne Pritchett --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- 203-924-3170