Hello and thank you for this great tutorial. Most of my questions so far have been answered in previous discussions but now I feel a little stuck although I have found a temporary solution. After detailing the first wood plank while trying to link it to the other planks, with CTRL - L -> object data, all the planks dissappear. What happens actually is that they all change position and rotation according to the first plank. If I move them with snap, individually, eventually I obtain the result. But I wish to know where did I go wrong. Inspecting each plank, it seems they all have the same values for positions.
Actually, the next video solved my problem. I had to set the origin of each plank to the Geometry. All the planks had the same origin in the center of the box. I hope this one will help others.