Just searching for some advice. What is the best way to hookup multiple rf systems without loosing picture quality? Say 20 Units. I have the rf to coax converters like u see on ebay but can't find a coax switch box for more than 2-4 units. I have heard that if you piggy back them in a chain you loose quality after about 3 piggy backs. I am sure someone out there has found the perfect solution.