I check this site very often to get info, its amazing the knowledge here. I was just wondering about the wide angles needed for the slimline dish for hd. Correct me if I am wrong, but is 20 degrees needed on both sides to get a good signal? I get probably half the hd channels I should be getting, because of trees I am told. If it takes that much clear area, there should be a lot of people with this same problem. I don't see a lot of this talked about though. Maybe I have some other problem? I've never had any problems until the hd channels were launched. If a person needs multiple dishes, or something like that, I would think that would be a hard sell for switching to satellite. Thanks.