Truly beautiful.
Just two suggestions:
The first is purely mechanical: the straight pin, without a draft angle, makes the assembly more stable and more precise; a gap of 0.1 - 0.2 mm should be fine for all materials. It could also be extended by a few millimeters.
The second concerns the tree-topper attachment: a support tube can be helpful to stiffen the tip of the tree and help it stay straight. For now I made one out of cardboard, but it could be useful to include it among the print files.
If i find the time, I might try making a remix or send you the drawings.
Other than that, it's a really top-notch, it's fantastic.

























