Thank you for your reply!
I take it that your laser is strictly on/off when connecting it to the fan output? Doesn't the ttl drive enable pwm kind of a control to it?
Anyway, while searching the web I came a cross this (https://www.youtube.com/watch?v=9PijjOQbtZo). I was wondering if it would be possible to use that LaserWeb3 (free) to generate the gcode and then import/copy that to the machine control software of your choice.. if it would be possible to add to it the pwm control, you could get more out of the lasermodule..