Hi Darryn

No, there isn't enough foam in the hulls to keep her afloat if the water tight bulkhead is compromised.
I have faith in the products Iam using. Iam quite sure it would take a direct hit on the watertight bulkhead for it to fail
But if it dose fail, at least I will have 1 hull afloat.

No, my set of plans do not mention this method. Iam not sure what the latest set of plans stipulate.

Regards TJ