SPB:
Prior to getting upgraded to the higher weight, anything above 3200lb / 1451kg had to be carried on the hook, as the skids weren't rated to cope with that, and in an auto, that excess weight could be pickled off.
Now that you can carry it internally, you will be pulling lots of power and you are in a similar situation as with pulling over 85%Tq, limited in speed to 80kt. This is largely due to the bending stresses on the driveshaft between the engine (fixed to the fuselage) and the transmission (able to tilt slightly forward) and also on the mast (mostly fixed to the vertical position) and the rotor head (trying to pull the mast forward).
You want your machine to survive to the next overhaul, treat it gently.
