Suggest configurable tree chopping height

ForestryForMC mod has a Giant Sequoia with a 4×4×80+ blocks trunk.
Even using a Stellar Axe (or darkSteel Axe), this tree can not be chopped in one go.
The axe seems to stop looking for logWood blocks at y+31.

It would be convenient to have this axe chopping height, width or blocks count configurable. I'd boost it to y+127 when forestry is installed.

There would probably need to extend the Farming Station working height as well.

Please note that the configuration for the Farming Station is in the base config, too. That's where the farming modules live.