I worked with the model, and think I have this figured out. Doing a test print now.
You aren’t wasting my time - I love troubleshooting! 
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OK! I’ve got a working solution for you!
In the zip file you downloaded from Thingaverse, use the one labeled ‘solid,’ then change the following settings:
These settings will give you 1 outer wall, and no bottom!
Make your single wall extra wide so that the overhangs print well, and the model is sturdy.
Turn this on in the filament profile settings, under cooling, so the outer wall speed is constant - this will keep it looking clear.
I’d enable a brim for good bed adhesion.
I would also set “Seam Gap” to 0.
I got results like this with some very old waterlogged filament. And this is ABS…I assume you are printing PETG? It should look great I think.
Fotally Tucking Awesome! Thanks!
I’m baby sitting right now but I’m going to give this a try as soon as they bury their little faces in their phones and zone the rest of the world out.
If your interested in the code, since you have printed one, I just used the Neopixel example script with an DF Robot Beetle, although any Arduino or clone should work. I did add some more colors as the script only used one color at a time. So I added Red+Blue, Red+Green, Green+Blue…
The Neopixel ring is 16 LED and 70mm round. I’ll upload the model for the base if you want it. The way I mount the Beetle isn’t great as the piece that screws down just squeezes it in place.
Ohhh! Very nice. Thanks
Oops. I’m using Nova Maker PLA. I haven’t graduated to other filaments yet.
Any chance of getting this model to accept an Inside Brim? It wouldn’t need to be removed if it was inside.
If you set the brim distance to .1 or even .05 it should provide adhesion but peel right off
I was thinking if it was left on, the tree would be sturdier around the bottom. The hollow model in the folder has about a 20mm bottom ring that resembles a brim.
And I forgot to add the brim to the first print. It didn’t get very far.
It wont allow an internal brim. The slicer doesn’t ‘know’ that the inside is hollow. As far as the slicer is concerned, this is a solid (watertight it is called) object with bottom layers - the number of bottom layers just happens to be 0.
You can create your own brim-like structure by keeping 1 bottom layer, and then putting a cylindrical modifier in the center of the layer that has no bottom layer. I’m including a video to show you.
Hey! Just a friendly suggestion - consider giving yourself a username so we can get to know you Totally up to you though.
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Hey - Just wanted to see if you got your trees done to your liking. No pressure, just curious.
I’m afraid those settings didn’t work out for me. It started with a nice smooth print on the bottom but gradually got rougher as it grew. Also, it didn’t print with that clear look like vase mode did. It turned out kind of milky and doesn’t let light through very well.
I’m going to see if I can dial it into my filament but I’ve got some other projects going on that need to get done this week. I’ll let you know if I can get it to improve. Thanks Again
Bummer! Different printing mode, new problems!
-The lack of clarity is likely due to the speed and/or temperature. Some clear filaments only like to be printed in a narrow speed range. You could try higher and lower speeds, or raise/lower nozzle temp.
-The roughness may be from not enough cooling on smaller layers.
Just some things to try if you decide to give it a go again.