Hair Multiplication and Hair Direction, Again

This post is a follow-up to a question that was previously asked (see How Would Hair Multiplication Grow Hair In the Right Direction?) relating to controlling hair direction if one injected cells into the skin for hair multiplication.

If there is a mature hair follicle, then the hairs would have to be carefully placed for direction control and depth control. If hair is placed too deeply, then the hair will not grow through the skin, but will be attacked by your immune system as a foreign ‘invading’ body and destroyed. If it is placed in anything but the exact correct direction, it will not grow in the normal direction. If the hair is placed as a ‘stem cell’ that could be controlled (a big stretch in thinking), exact placement of the cell may be critical to actually growing hair. If is is a cell or a series of cells that would grow hair, would the new follicle know up from down (like a plant seed)? Clearly, there will be an art to growing hair when and if it can be done.