Rick, I think I can solve your dilemma on the ring voids that occur sporatically on layers 5 and 6, but there are several questions that I need answers to before I can give you advice on what is probably the root of the problem. It might be better to discuss this by E-mail (off the TechNet), so that we don't tie up the net. Either that, or by fax, or telephone. Ray Lockshier Independent Contractor for Solder Training, Problem solving, Product Flow ect.. 1584 78th. Terr. N. St Petersburg, FL 33702 Phone (813)576-0488 Fax (813)577-3295 ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################