for the J Tech Photonics laser kit you linked, I think it already contain everything you need, including the fan, shield and googles. Confirm with Jay (he’s been very helpful). You really don’t need the line lasers 🙂 I actually ordered those and printed the same mount before I even got my lasers. Ended up breaking the line laser mount, cut some shields to put them around that mount and just set my fan to 3 (this should give you a very low light from the laser) and focus using that.
If you want to mount your router and laser at the same time, use Leo69’s mount -> http://www.thingiverse.com/thing:1301138
It actually mounts to the tube, leaving your router mounted as is. This is what I’m using right now. The shield can be adjusted using magnets and a 1/4-20 screw