Fin against rock at Lake Weyba.
Have a look at the before and after pics. Repaired by Ed Doolan at Manly West, as recommended by Simon from BC.
Quite amazing, you can hardly see the repair. Plus top bloke and reasonable cost.
I'm mid way through putting a new box in one of my boards after catastrophic failure. Its not the easiest of jobs. Looks like you're repairer is on the ball.