Severne sails
 

I have just bought a starboard isonic 105, and have the option of 3 7.5 m severne sails:-
2006 7.5m C2 - cheapest
2007 7.5m element
2007 7.5m overdrive

Which one would you recomend. I am a rereatonal sailor who likes to go fast.

Would a 7.5m be a sensible biggest sail for a isonic 105? If I go for 8.0 I would need a new mast and boom.

Thanks
Andy

Not Team
I have tested C2 in 6,5 and 8,5 good low end, easy rigging, and good balance. Really nice sails.
I have used Overdrive 8,5 and Code Reds' for a year. It is super fast and stable slalom sail. A 7,5 is perfect size for the 105.
For going fast, take the overdrive, no doubt. Very close to full race sail performance, but more grunt and way easier handling/rigging. Take the right mast, blue or redline and a mast extension that fits to the pulley position.
Fastest sails on iSonic are 6,2-7,8 sizes I think, but it depends on your weight and conditions.
It can take up to 8,5, but it depends on, if you are a heavyweight or lightweight.

Cheers