mat4613 said..
will a 9 meter kite be ok for us in 15-25 knot winds?

Yes in 15 knots bare minimum if in flat water, but more like 18 knots bare minimum if you are in the ocean with current. Up to 25 knots is fine, as long as your lines are well tuned, with a bar this old it's highly likely your front lines are longer than your back lines and that it's needs some adjustments to avoid overpowering the kite, so be sure you check this. Your big board will help but you will quickly find it too big when you get out in higher winds and in choppy water, it'll be harder to edge and harder to go upwind in these conditions.

mat4613 said.
the bar is a cabrinha 2011 IDS and flags to both middle lines not just one middle line will this be ok ? Will it still de power the kite if things go wrong ?

The best answer I can give you is: yes/no/maybe.

Kite flagging on dual front lines is never a guarantee, especially if you start mixing different bars with different kites. You won't know unless you try it, which is something you must have done in your lessons?

It probably won't work so well in lighter wind but may work in stronger winds. Practical use of your safety systems and practical self-rescue skills in deep water are more important than the type of safety system you are using. During your 8 hours of lessons, have you done a practical self-recovery of your kite on land using your safety system ? During your lessons, have you done a practical self-rescue in deep water, alone, without help ? If you have done those drills solo during your lesson then you shouldn't worry about testing your safety system and recovering your kite.

There are a few simple methods to force a kite to flag on dual front lines if it doesn't flag out as soon as you release the safety. Again, this must have been covered in your 8 hours of lessons?

Christian

Thanks for the detailed response yeah we did cover the rescue methods on the beach but not in the water we went through the theory on what to do in the water using the kite as a sail ect and not getting tangled in the lines. The kite we used was much newer though and flagged to a single middle line not both just wanted to make sure with the bar set up to flag to both we don't get rag dolled down the beach if we pull the safety.

The lines were actually replaced so the middle lines are slightly shorter then the outer lines which I think would depower the kite a little yeah ?

So how do you force your kite to flag we didn't cover this at all? The next step as far a I know was setting the kite free altogether

Look up ids bar on youtube they have a awsome tutorial on how to tune your lines good fun easy and u learn something i was 90kgs last year and could get going on a 9m cabrinha kite and similar board

Good idea going halvsies with your mate

My 2012 17m argo genuinely had less power than my xr3 12m core and i wasn't even flying it in light winds (15+). The 9m might be amazing but my 17 certainly wasn't.