... the height of the Y point will make a big difference to the kites performance, especially with the bigger kites.
Back in the day I was using my Naish X4 with its 4 line bar (where the Y point is right down at the depower strap) and it flew fine, then I got a 5 line upgrade Naish put out and the kite flew terrible. After modifing the bar and lines, I put the Y point at 1/3 height as apposed to 1/3 from the top and it flew better.
The North bar has a Y point which is high and pinches the kite in, or 'icecream cones' the kite. I'd say the Ozone won't like the extra pressure pulling 'in' that the high Y point North bar has!
I put my North bar on my Core kite and it didn't like it at all.
cheers,
Robbie