GVM upgrades & 4.5t towing in a Ram 1500 in Australia. Can it be done and what is limiting the truck

The ASV Complied RAM 1500 has been a sales success for RAM Trucks Australia.
Even through the economic downturn of 2020 due to COVID-19, the Ram Trucks Australia continue to sell in large numbers.
Recently, a report from a company who has been investigating the ability for these trucks to have their GVMs upgraded has highlighted some concerns about the 1500s ability to tow its claimed 4.5t.
This has followed other videos on this channel where we have investigated the ability of the RAM 1500 to legally tow this weight.
We have a look at the findings by this company and how this intersects with previous reports on the RAM 1500s towing ability and discover that there is some new information which seems to make matters worse.
This video is the personal opinion of the channel and is not intended to critique the buying decision of any RAM 1500 owner. Rather, it seeks to provide the information this particular firm has made available.