I have 2 dish 500's 1 for 110 and 119 and 1 for just 129. I got the info for the the adjustments to change the direction, elv, az, and skew on my dish 500 with just 129 on it to make it work on 61.5. is that all there is to do or do I need a different transponder? If I can make this into 61.5 do I just go into point dish and select 61.5 to fine tune it and lock in? thanks for any help