So, continue to increase her flexibility.

At this moment:

Shin Twist +20 degrees each side.

Thigh Bend +20 degrees each side. (much greater than most normal people).

On the picture:

Human proportions, 'FlattenFeet' morph = 0.75

hip rotation x 85 deg., left thigh bend = 0, right thigh bend back at 50 deg.

She touch her head by toes and keep straight line between hip and left thigh, it's not simpy, right ?

 

'Flex' morphs will be separate INJ-pose to base model.

Why I don't include this in base model ?

JCM-correctors slower programm work, it's price for big flexibility. But if you don't need her flexibility, I don't see any reason to slower work.