Any N 5.0 sailors using a barberhauler?

My N5.0 has a huge jib, at least it has a long foot. So far it seems to belly out fine downwind without a barberhauler but I have not crawled under and watched the slot while off the wind. There is no gear nor holes in the beam indicating where some previous owner felt they needed a barberhauler.

Anybody got one on their boat? How about on the Nacra 5.7?