There have been many developments in laser technology and many updates to the page since then - check the version history (unfortunately missing dates) and you

There have been many developments in laser technology and many updates to the page since then - check the version history (unfortunately missing dates) and you may spend a few more hours! http://www.repairfaq.org/sam/lasersam.htm#samver http://www.repairfaq.org/sam/lasersam.htm#samver