I have two routers running tomato setup as dedicated WDS units. Their sole purpose in life is to connect my upstairs routers (tomato access points) to the downstairs routers (also tomato access points and the main router) and the WDS units do not serve as wireless access points except to each other. I have mac filtering on so that they only talk to each other and ssid broadcast is off. I have the upstairs access points hardwired into the WDS router upstairs and likewise the downstairs access points are hardwired into the down stairs WDS router. I did this so that I do not lose any internet speed by having the access point carry the additional load of serving as an access point and WDS. With this setup download speed from upstairs is almost as fast as it is with a machine wired into the cable modem (downstairs) but with wireless security off I see a slight increase in download speed. I am wondering since the wireless mode is set to WDS only on these dedicated WDS units if I can turn off WPA encryption. They do not show up as access points and I don't think you can link to them wirelessly from a computer or can you? A crude diagram of the setup is attached.