Ok here is what I have A dish 500 ( legacy) (119 &110) running into a SW44 switch and 3 receivers hooked up to 3 of the 4 outputs on the Sw44 since the 721 is dual tunner I will need to run 2 more cables from the Sw44 switch but there's only 1 output left , so what do I need to add that 5th line , will a splitter work , if so what kind , Or do I need to but another Switch , Please keep in mind I need the cheapest route possible , Also if you know a place that sells what i need please let me know