First I tried to print the Remix https://www.thingiverse.com/thing:2776387 but there seemed to be an issue with missing geometry.
But I really like the design so I tried to fix it quick and dirty using Tinkercad. This worked quite well, at least for me.
I suggest printing the tube with supports.
base.stl | 808.1KB | |
tube.stl | 224.7KB |