I have a symmetrical spinnaker for my Oceanis 40'. I work it out to be around 70m2 give or take. (14m luffs and 8m foot)

Would 10mm double braid polyester line be heavy enough for the guys? And 12mm for the sheets?

I have 2 x 25 metre lengths of 10mm which came from my dad's Brolga. Not sure what he bought it for but it's brand new so he obviously never got to use it.

Interested in opinions.

Cheers Gerald