Me again. I found that the top 8 branches are very tight fits. I can only speculate as to why they would be tighter than the others, maybe heat deforming small parts. Anyway I increased the diameter of the top 8 by .003. The top one is still tight but the hole cannot be made bigger in this tiny piece. Here is the revised svg
With regards to the lights. It is a non trivial task to make the lights and connection to the controller. In fact I do not yet have a robust model. Here is a picture of what must be made to fit into the tree once the tube is removed.
Two finished, one under construction. I will try to have complete instruction as soon as I can. If you’re not good at soldering then this is not for you. But, since it’s for 4th grade I will donate one if I finish in time for Xmas.
Thank you again, my class would really enjoy it. I am not someone who has ever soldered. I was considering my light source, I had not decided what to do. Yours is so vibrant.