My only comment concerns a higher Tg material. I have found that anything over .062 should be on high Tg material. Found that the holes do not stand up well and with a high aspect ratio there may be thin wall holes in some areas. It should not cost more than 5% for material ONLY for this material. (I quote boards and this is a fact with my company) However 170 degree is plenty....... ################################################################ 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 ################################################################