I have had plenty of success working the 129 on a plus dish. It's about peaking the 118 not the 129.
I fine tune on the 118 before locking the dish down....
this seems to be the best method to insure good sigs on all sats..
for clarity here's how I do it..
Peak on 119..then look at strengths on 129 and tweak if necessary.
then I fine tune the 118.7...
Using this procedure I am getting sigs on the 118 no lower than 70 on the weakest TP's..129 is a breeze
Good luck