Six runners will, indeed, be a challenge.

   

What's wrong with cutting out the divider between the two ports in the side housings, in effect converting to a 4 port?

--
This is by far the hardest lesson about freedom. It goes against
instinct, and morality, to just sit back and watch people make
mistakes. We want to help them, which means control them and their
decisions, but in doing so we actually hurt them (and ourselves)."