Also, it helps to set the RCS mode to VERN on the C3 panel.
If the ADI is jumping aroud, and you can't get it into the correct position, go into OPS201, and enter ITEM 18 EXCE, and the shuttle will adjust to the proper attitiude, although you may need to make some fine adjustments at the end.
I also find that the ADI dosen't jump around if you adjust your attitude in the order of pitch, roll, yaw or roll, pitch, yaw.