Aluminium bulkheads will come sooner or later as original hop up from Tamiya. I will wait for them.
In the theories of some users here every TRF car has bent aluminium bulkheads in a crash. Can't confirm that nor had ever a problem in my TA05R or TA06R. Both fully equipped.
Aluminium lower decks in the new generation cars are more prone to bend in a heavy crash.