TFOX,

Here is the method that came with my G5 Optix ME.
1. Using a plumb bob, or similar, hang from elevated position. i.e. ceiling
2. Nock an arrow and kneel down on the floor while holding bow.
3. Draw bow back with nocked arrow and aim up toward the plumb bob. now align the top and bottom pin to the plumb bob. Take a look at the bubble vial.
4. Let bow down from full draw carefully. Make adjustment to bubble vial by loosing and tightening set screws.
5. Repeat steps 3 & 4 until bubble vial is perfectly aligned at full draw.

What's your thoughts on this method?