I was doing the same same thing, that is, fudging the LONG settings after a severe wind storm re-adjusted the dish. I reset the LONG to the correct value, then with USALs sent the dish to 83W my near true south sat. Went up on the roof and loosened the bolts holding the motor to the mast and tweaked for max Q. Also tweaked the dish elevation while up there.
It took longer to set up the STB and monitor outside then the actual motor/dish alignment.