If you are looking for help with Qubicle, modelling, tips and making it ‘Stonehearthy’, I recommend you check out @voxel_pirate’s thread.
As for balancing the sword, you could add another worker to the class tree, above a blacksmith, who requires a certain amount of skill to become the swordsmith or whatever (don’t quote me on that second part, I’m not sure what is required for a craftsmen to be able to upgrade)