Back to potting in epoxy. I have two clients that pot the circuits, not to protect from copying so much, but enviromental protection. They have beend doing it for years, doesnt affect the analog circuits. So it depends on the circuit of course. Try one and see, then you will know. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist