My Surf SOHO MK3 router is going to be moved to a location that is out of the way and near walls ( That is where my ethernet drop is.) . I am thinking of buying some cable and moving the included antennas to a more unobstructed location. I do not anticipate needing cables longer than 3 meters. Please advise on what is needed to get best results. All 3 antennas? How far apart? What kind of cable? ( Amazon sells "wifi extension cables, is that ok?) Please let me know anything else.