QA-TEE-2: I threw my drive off a raised concrete tee pad. When I let go, the front of my foot was hanging off the front edge of the pad. Was that a stance violation?

No. The rule states that all supporting points must be within the teeing area at the time of release. “Supporting point” refers to any point on the player that is in contact with the playing surface (in this case the tee pad), rather than to a complete body part such as a foot. The part of the foot that is hanging off the end is not a supporting point because it is not in contact with the playing surface, so no violation has occurred.