Last summer my friend asked me to aim a dish for him. He had a dish looking only at 119. He was given what I believe is a Legacy Twin. He has a Dish 301 receiver. I could not get the receiver to see 2 Sats at all, only one. I have had no problems aiming Dish Pro equipment. We gave up and aimed for 119 only. Does this Legacy Twin need a 21 switch? What am I missing here? The check switch did not seem to recognize that the dish was looking for 2 Sats. Thanks for any help.