1) Running copper foil thru my laser printer scares me. I would want hear of testimonials that said it looked safe. 2) My experience with TEC 200 was that it was hard to get the toner to separate from the base sheet. 3) I had the best succes (made several double sided protos) was using gel paper from DynaArt Designs. Yopu can look them up on the web. Also this paper is sold by DigiKey http://www.digikey.com I have not seen a technique I liked enough to consider it for production boards. I am happy with the ability to rapidly prototype. Gus -- Gus Calabrese Lola Montes WFT Electronics 4337 Raleigh Street Denver, CO 80212 303 964-9670......voicemail wft@frii.com http://www.frii.com/~wft EMERGENCY: 791 High Street Estes Park, CO 80517 if no success with wft@frii.com, try .... wft@bigfoot.com then wft@eudoramail.com