Re: Standby for downvotes!
To get the MW3 and MW6 to work, just pair them with the MW3 as the primary node then plug the MW6 to the router. As soon as you turn off the MW3s the MW6 becomes primary. Having said that, when I did this the whole network of them needed restarting once a week or so due to speed dropping down to under 0.2mbps.