Having just looked at the laser spec - it is a lot bigger than I thought, BUT daft as it seems, will it mount in place of the milling head on your router. It might look a bit hideous, but may be the simplest way to do it, if you have 6ft clearance. You only have wires and pipes to connect to it.If the laser is not mounted on the head, i cannot see how you can keep the beam on the work ( even by mirrors) as the head moves round the table