I wonder what the ferry MTOW was, certainly not experienced here but don’t you get an overload MTOW?
Under CASA regs, a minor modification will allow up to 110% MTOW. Bit more work required to get anything more (classed as a major modification), but twin otters for example have a flight manual supplement permitting up to 40% over MTOW. Lose an engine though, and you are pretty much guaranteed to be swimming if you’re still over MTOW when it goes.
And inexperienced pilots still think it’s a great way to build hours…😎