Thanks, guys :-)

I had been rolling the jib along the luff, which makes it too long to fit into my car. I'll look into rolling it along the foot, like the main could be done. Since it's a furling jib, there is a batten or two oriented along the forestay, but they're not real big.

I've also got a Force 5 storm sail that I got last year 2nd hand. It came folded very neatly in its bag. I've only opened it once for inspection, then refolded it as before. Creases are very obvious. The seller made a point of this as proof of little use. Should I take this out and roll it too?