If there is a leak you can always find it from outside before removing the bladder. It will be harder to find the leak once you remove the bladder anyways.

The key thing is to pump your kite very hard, overinflated in other words. Then you will find the tiniest leak 10 times easier with a spray bottle mixed with water and soap (decent amount of soap helps).

You can then grab a black permanent marker where the leak is and by leaving it long enough on the LE it will mark the bladder underneath as well making it easier to spot the leak once you remove the bladder.

Good luck

Ive done the whole soap spray, might pump it up to 10psi, currently pumped to 8.
Cheers

You lucky lucky bastard.