Rear cockpit bulkhead oilcanning

[tortuga]

So I've tracked down a rattle to the fire extingisher mounted to the back of the cockpit CL on the rear bulkhead, which is appears to me an unreinforced single Matt of fiberglass...it is separate from the front bulkhead in the trunk: the gap is visible from the sie of the car above the rear wheels.

Thinking about simply fabbing up a piece of wood to fit relatively tight in there transversely, slathering with sikaflex, and screwing the extinguisher mount to it from the front, and a temporary screw from the trunk to secure it while setting up?

Any one else tackled this issue?

Thanks

Steve H
1764