Dishpro lnbfs are erronously being reported as not usable with Fta receivers because of internal switch. this is not true. You can use them with no additional switch needed. The only time you will need to use an additional switch is when adding a second dish to your system. Pro lnbfs have a built in DISEQC switch not a sw21 as the legacy twin has. You can easily identify pro lnbfs by a large black D/P label. see here:/www.labyrinth54.biz Mod & Admin)