Probably well known but i just encountered this:
- lumberjack till you are close to max weight
- drag the lumber and keep it up with the target cursor
- use ingame macro (last object = axe, wait for target, last target) to chop tree again
=> it will now go over the 600 stones, i went up to over 1100 stones with this
=> if you still have lumber left on the tree, but it is saying you can't place lumber in your backpack, just stack the lumber you are dragging with the lumber in the backpack and drag it again, hold it on cursor, use the macro again
=> can repeat this untill tree is chopped dry
This is probably the same trick that exists to convert logs into boards very fast or based upon this.
I just happened to accidently encounter this during "manual" lumbering
