It seems all a bit academic to argue about weight issues when the plane sucessfully got airborne off this purportedly too short runway. I'm reliably informed that two passengers on board had no luggage and several others were small ladies. Its not the take off that was the issue, but what happened to the aircraft that prevented it flying away that really counts.
However leaving this subject aside, the mayday call apparently contained the word 'fire' in some context, and the propeller was at dead stop when it impacted the ground. Not really much to work with for the poor pilot.