With all due respect to the deceased and the Coroner, I don't buy this for a second.
Presumably the figures were modified initially so as to allow RA-Aus registration however we are led to believe that somehow the aircraft was assembled and NOT weighed? The builder must have known the actual weight was too high and the weighing records and weight and balance calculation followed to reflect this.
I would like to see the full transcripts.
Unless perhaps it was sold second hand and the new owner and maintenance providers were unaware of the actual weight of the aircraft.
Edit: Got it, I suspect the pilot was not the builder or owner.