First my beloved Lab - hopeless for this image because we need a delicate touch to lighten - not the sledge hammer of the Lab L channel. But we gain on the colour front - or not in some areas.
My main object is to lighten the faces and to hell with the jumpers, I'm prepared to blow them. But my curving was much too violent giving me terrible problems with the bottom of the main jumper while trying to retain a little of the sky.
Regard this as playing and for pulling to pieces! - but I like the colour on his arms
and here is the curve
http://www.broadhurst-family.co.uk/CurveMeister/QuadKiteFlyers.jpeg-Lab.acv
[Greg - can demo users load saved curves in CM if they want to? I know they can in PS]