Bob.. Why are you leaving yourself open to possibly destroying a multilayer by drilling to break a connection. We are a Military supplier and have eliminated almost all board drilling on multilayers by other methods of lead isolation. There is just too much risk involved with drilling, copper smear, crazing, laminated damage, etc. Not knowing all the parameters, I am assuming that you want to brake a connection and leave it open or add a new jumper. If it is that simple, why not just isolate the leads from the trace by cutting/isolating the leads and reconnecting as required? If you can give more detail or would like to talk about the rework procedure, please feel free to contact me. Hope this helps. Phone : (203) 852-4810 Regards, E-Mail : [log in to unmask] Bob Vanech *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************