How to level a Tripod with a 501PL-compatible Head

The following is also shown in the photographs included with this model.

1. Remove the Quick Release plate.
2. Insert the Quick Release plate stub.
3. Place a dual levelling bubble on top of the stub.
4. Do whatever adjustments your tripod supports until both bubbles appear in the center of their corresponding levels.
5. Remove the stub.
6. Replace the QR plate, add the camera and such.
7. Take some great pictures or videos.

Repeat every time you move the tripod to a new place.

This is the dual bubble I use.