Here is a blog posted and instructions of modifying a Chinese made 40 watt CNC Laser.
http://3dprintzothar.blogspot.com/2014/08/40-watt-chinese-co2-laser-upgrade-with.html
The builder Dan Beaven is cutting free parts for people to test his machine but there are stipulations, as to supplying STL's, some other's as well. Here is his post on the Google Delta forum.
https://groups.google.com/forum/#!topic/deltabot/orxefdoMI2U
Dan started his own Google group here.
https://groups.google.com/forum/#!forum/opensource-laser
http://3dprintzothar.blogspot.com/2014/08/40-watt-chinese-co2-laser-upgrade-with.html
The builder Dan Beaven is cutting free parts for people to test his machine but there are stipulations, as to supplying STL's, some other's as well. Here is his post on the Google Delta forum.
https://groups.google.com/forum/#!topic/deltabot/orxefdoMI2U
Dan started his own Google group here.
https://groups.google.com/forum/#!forum/opensource-laser