I reckon you just give it a go and see what happens! Worst case, death loops and being dragged up the beach and across the road!

Thanks sunseeker,
I will lay the lines out this arvo to check the lengths if the line up will try it out tonight ( pray for wind ).

If it doesnt work, I will try your suggestion regarding other fifth line bars.

thanks for the input

I'm no expert as i've never even tried either kite... But my mate flew a fuel that was a year or 2 old just the other day using bar and lines from his switchblade 3. It all worked fine.

BUT remember that because of the shape difference, when you let the bar out whilst hooked in this will only depower the fuel a little. After a certain point the back lines will go slack and the fuel will still be holding a fair bit of power as your two front lines are attached close to the LE wing tip (instead of a bridle). so Imagine it like this... you're flying the kite by the front wing tips only meaning that the kite can sit in a position where it holds a lot of wind rather than letting it easily flow out the back of the kite as you sheet out.

My mate experimented using a small fuel which seems sensible.

As the fuel will hold power even when you 'sheet out' I suggest you hook your safety leash to one line (I think there is a ring on the right hand back line for cabrinas by memory). so if everything goes wrong, release so that you are only joined to the kite by 1 line. Hope this helps.