At our level, we definitely should be taking a chance on the skillful players who are slighter on the physical side. If they develop suddenly, we have a player on our hands that would have otherwise been out of reach. Sometimes you end up with a Sugden, Wolfenden, Bove or Byrnes, sometimes a decent player like Winchester, maybe if we're lucky someone even better.
On the other hand, Knight has quite a bit of physicality about him. It may not be a high level, but I bet he's come on loads playing against men for Ashton United for most of the season. He scored 2 in a 10-1 win at bottom club Skelmersdale last night.