good luck, Wildblue dishes are VERY sensitive, if the dish is off by a quarter inch in any direction, it will not work well, or possibly, at all.
Get a good angle finder and put it on the arm and use that setting... and move it very very slowly, stop, give the modem a few seconds to try to lock, then move it a hair more, stop, give it a few seconds to try to lock, repeat... it is soooooo much easier with a meter