Tree Leg
thingiverse
I've managed to pack a whole lot into this thing. It's pretty big, so I'm not even sure if it'll fit in your tree. You're welcome to do what you like with it though!
Download Model from thingiverse
With this file you will be able to print Tree Leg with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Tree Leg.