First let me say Eric must know the lady about whom I speak. Ouch! Concerning a more vital, doubt it, issue, there is no reason to expect the PCB version, on whatever material, will go out of whack like a potato chip. BGA's are built on BT based boards and they stay reasonably flat. You know it depends on how well the design was effected. You know - balance, construction, etc. Just have to try them and see. If they do warp, what are your options? MoonMan --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------