Well,

The very first time I beat a Nacra 5.2 was solely due to my roller furling jib. The winds were up that day and we both decided to leave the beach on main alone (my jib furled and his on shore). Once we were out on the course, the wind lightened up enough that I was able to unfurl the jib and after that, the other skipper didn't really stand a chance.

It's also very handy to furl the jib when parking between races. So, I'm not about to try taking it off.

Regards,
Eric