Hi, I used Fusion360 as it is great to work with STL files. So I made the tree heart 1 mm thicker for more strength, enlarged the hole in the base accordingly. And the light is originally meant to be used for Bottles, Glascups etc.. I just designed a screwable holder with a hole, because the shadow of the tree and the lithography didn't match. If you like I can upload the print files. but I have to admit the tolerances of the mount are a bit rough, because i need the present today and received the lights for the design yesterday 😅, so not much time for test prints. But it works.