The problem you are stating is one played out all the time in the flex manufaturers the main problem is one of movement with in the pannel on large or long flex circuits 2 -4 layer I have seen pannel move 20 mils. yes tighter toerance can be done but your pannel nneds to be balanced in copper area all sides, the cover coar is probably drilled and a manufaturer can individualy measure each pannel and tweek the drill file to comensate some what but its expensive and slow. so I would guess the board is not a small unit from what the circuit fab house is requesting. re submit with size and copper weights and area on all sides and we may be able to help you. [log in to unmask] --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------