I'm just considering upgrading to SKY+. My existing setup is a Panasonic Sky box and a Humax 5400. I have a two port LNB one port feeding sky and one feeding the Humax. Sky have told me that I will need a 4 port LND so that I can supply the second port on the sky plus box. Can I feed the second port on the Sky + box from the LNB loop through on the Humax Box?