I currently have a Superdish aimed at 119, 110, and 121. Because of tree issues, which can't be resolved, the signal on 110 keeps dropping out. Signal on 119 and 121 are OK. Before Superdish was installed I had a Dish 500, which worked just fine with 119 and 110. I am thinking of mounting a Dish 500 again in addition to keeping the Superdish for 121. Is this advisable? What about the switches? Is there anything else that should be considered?