Quite a lot of debate regarding bearded highlanders! Maybe not as common as you think!
When you look at the Penicuick sketches you will be hard pressed to find a highlander with beard.
However the suggestion of some extra heads is a consideration, near the end of the range I want some more highlanders just in shirts which will allow some earlier armies to be raised. It may be a good time to look at a few conversion sets then.
Thanks
Graham