Just published another small script, could b euseful for some of you too, guys.
Here it is:
https://gum.co/FjhmIt replaces control objects' shapes with part of a character mesh, which will deform and follow the skinned mesh and animation. You will be able to just click on the arm, for example, to select arm fk control. You can see how it works here:
It is based on this technique:
https://vimeo.com/155562003