Do you have line of sight for the 129 location? If so, do you need 61.5 for anything in particular? If yes to 129 and 61.5 not needed particularly, could just repoint that wing dish at 129. If you need 61.5, then I would suggest a 1000.4 to replace the wing dish, and then the 118 signal off of your 500+ into the lnb in connection on the 1000.4. Not sure why the agent said you couldn't do that, because that's perfectly acceptable. That aside, 118 isn't even part of the western arc.