Dremel CNC mount with laser cross sight.

I mounted my dremel onto my root2 40x40 cnc, (https://www.thingiverse.com/thing:2286040) and wanted laser cross hairs for accurate sighting so I redesigned the mount for the laser.
The laser is 12mm dia. http://www.ebay.com.au/itm/650nm-3-5V-5mW-Adjustable-Red-Laser-Diode-Cross-Line-Lens-Focus-Head-Laser-/262978978839?var=&hash=item3d3ac4c417
The Dremel is a Multipro #395.

Using GRBL I simply use the coolant output to switch the laser on/off. It can be connected directly to the coolant ena