I am an “Eastern Arc” customer. I get very good signal strength during sunny weather but the slightest hint of rain within 100 miles causes various levels of outages (ok, I exaggerate – but not much). I was thinking of adding a large round dish to point at 61.5 since that is, most often, the problem child and hosts the majority of the programming I watch. Is it possible to hook a 30” round dish into the extra port on a 1000.4 for 61.5. If so, how do I determine the new AzElSk to optimize 72.7 and 77?