If you struggle with edge quality on your flip jump, or picking close enough to your skating leg to have good axis alignment on your flip jump, use this drill to help practice.

Place your picking (landing) foot softly on the top of a yoga ball, and use your hip hinge in your skating leg to gently roll the ball back and forth with control. This can also be used to help skaters work on the stability of a salchow take-off.

Rotation: You can use this for single jumps, but it is particularly helpful and necessary for double + jumps.
Jump Phase: Entry.
Rotational Direction: This is demonstrated as a counterclockwise flip jump drill.
Body Alignment Focus: Leg position and hip position.
Use to fix common mistakes: Lack of edge control on flip entry, change of edge on flip entry