The fan for removing the laser smoke can be driven from the laser driver board. J Tech sells a kit with the fan and wiring but they offer the stl for the fan mount so you can use a fan you already have. I chose this option but I did not have the plug that fit the port on the driver board so I ended up ordering the plug from J Tech and it should be in the mail box today. The fan can be powered from any 12 volt source (which is what I had to do temporarily).
I am going to use my CNC for some lasing and some routing so I do not want the laser or laser driver covered in dust so I will remove and store it when routing.
I will start a PicLaser/Laser Etch thread soon and start sharing some info there.