The backlift should be initiated by a cocked top-hand wrist rather than dragged up by the arms, travel toward gully or point (or controlled straight back), and stay close to the body. A high backlift is not the goal; a repeatable one that leaves the bat able to come down straight is. amp scores three things here, worth 10 points of 100.
What each band looks like
Backlift Initiated by a Cocked Top-Hand Wrist
5 of 100 · filmed side or behind-on
Looks right
Initiated by the top hand, top-hand wrist cocking, bottom hand light.
Can manage
Both hands contributing, top hand still leading.
Needs attention
Clearly initiated by the bottom hand.
Backlift Direction and Proximity to the Body
3 of 100 · filmed side or front-on
Looks right
Toward gully or point, or controlled straight back, bat staying in close to the body.
Can manage
Slightly toward fine leg, or slightly away from the body but controlled.
Needs attention
Hands clearly away from the body, or an extreme fine-leg direction that closes off the off side.
Front Shoulder Dip at the Top of the Backlift
2 of 100 · filmed side-on
Looks right
Slight forward and downward tilt of the shoulder girdle, bat in line with the flight path.
Can manage
Shoulders level, no dip but no counter-rotation either.
Needs attention
Front shoulder lifting or pulling away at the top of the backlift.
These are the criteria as amp scores them. Reading your own footage against them is free and always will be — what amp adds is doing it the same way every week, so the change between one session and the next is a number rather than an impression. Apply for the pilot.