Hey, really need help on this one.

3D program: 3Ds Max to Away 3D

Has anyone been able to successfully make a cartoony character rig that can have stretchy limbs as well as bendy?

I’ve tried using the expression editor to make the bones stretch. It seems like it can calculate the bones, but the mesh does not follow.
Visualize: I animated the leg stretching, but when it is imported into Away 3D the foot translates all the way to where it’s suppose to, but the leg itself does not stretch all the way. So the foot and leg looks disconnected from each other.

Any ideas? It’d be a great help