I am not sure you understood me well. I do not need “invisible” repeating.

primary AP (connected to internet) with lets say 192.168.0.x range > wifi connection > AR300 (connected as AP client to prmary AP) with its own subnet for lan, lets say 192.168.8.x > eth lan > wan Glx750 with its own subnet eg. 192.168.9.x isolated from primary AP. So it is double NAT, in a way “routed repeater”.

i will test with roof antenna + small omni that comes with ar300m. Hopefully there won’t be much transmission errors.

thanks!