I have 1 oval triple LNB for my HD set and 1 18" for the SD upstairs. I have a line-of-sight issue so I had my installer angle the HD dish for a strong signal on the B&C sats with no signal on the A. My 18" dish is for all my SD viewing. I have 4 lines from the SD and only 1 line from the oval because I have only 1 HD set and no HD DVR unit. I purchased a Sony HD-200 and found out it needs the A sat for initial setup. I switched some cables around to get the setup complete now I need a multiswitch to get the (A) sat signal combined with my (B&C) from the oval. I was told I need a 6x8, do I?? Do I need to run another line from the oval? Right now the HD set is being fed by a single line from the oval to the HD-200 and works fine, just no SD channels. I don't want to shell out $$ for a 6x8 if I can use something else. A HD DVR is not in the near future but a possibility down the road.