I got frustrated with trying to get the original (https://www.thingiverse.com/thing:458903) to print right so I remodeled the entire thing up in Fusion360 with a flush bottom.
I've also added a modified version for easier printing and it looks cooler IMO.
Credit to https://www.thingiverse.com/mech-G
Print in vase mode or regular.
No support needed.
The author hasn't provided the model origin yet.