Made a few changes to files to eliminate the aluminum tube. Used the wood from the two long cutouts to act as the trunk of the tree. The two cutouts were approximately 3mm by 3 mm so I made the round holes 8.3 mm to accommodate the diagonal dimension of the 3x3 trunk. I also redesigned the star so that it fits over the trunk on the top (otherwise I would have had to drill the center of the trunk out at the top of the tree. The original file was a great idea and my minor tweaks just made a great design a little easier to make.