I am having my superdish reinstalled after 3 months of voom. From past exp. I don't have a lot of confidence in the installer. I have 2 hdtvs and mmay ad a sd tv in a remote room in the futere. I have a 942 and the installer is bringing a 811. I want to keep the winegard ota for hd locals. Is there a reccommed sight for suggested diagram connections? I will want the capability of 4 receivers since the 942 asks for 2. Please help