Most problems that I have seen with artwork fabrication relate back to problems with the aperture lists, e.g., mistyped, X and Y reversed, thermals not defined properly, etc. In a previous life, most, if not all, of these problems vanished when we received RS274-X (embedded Gerber, extended Gerber, whatever you want to call it) data. 1) Don't most CAD systems export this format? 2) Don't most CAM/photoplotters/laser plotters handle this format? 3) Are there concerns about the reliability of this format? (Based on my experience, this would surprise me.) Any and all thoughts would be appreciated. Thanks, Jamie Baumgart DSC Communications [log in to unmask]