Actually the ECM is a potted unit (epoxy or thermally conductive/protective moisture barrier. It is also done intentionally to prevent user tampering...and likeyl you will damage it as potting generally does not dissolve or "chip away" cleanly without damaging components. I work with some manufacturer that uses clear potting, so no need to dissolve or scrape, just decap or grind away the cover down the component layer and look into the design a bit. :newsmile040:
If you do try to take it apart, you may want to pass it to Hopple...he has done some disassembly of other components in the past. :s