Using 2 stars is better. It's helps isolate if you need to adjust Azimuth or Elevation. Therefore you are only adjusting one direction at a time (either the left/right knobs or the altitude bolts)
If you are only using 1 star at 45 degrees, the drift will not be as pronounced and you will need to wait longer to see the drift. Also I think it could get more confusing.
The method I adopted for my setup is really simple.
- Use the Left / Right arrows on the keypad to determine Left / Right. Rotate the illuminated reticle eyepiece to be in alignment with the way the star moves.
- Azimuth: Use Star on Meridian. If the star drifts UP adjust Azimuth to move the star LEFT
- Elevation: Use Star in West. If the star drifts UP, adjust Elevation bolts to move the star UP.