This started as a diminishing sine wave, where the fat part of the tube (bottom) is the high amplitude and the narrow end (top) the low amplitude part of the wave. It was then revolved around the origin to make a tube. This is all whimsy as design. I modeled this small and added individual and assembly files. The individual files do not have holes. The 3MF file has a negative cylinder built in so you can move the mount holes if you want. Also for this to balance on the hanging bar they need to be set at lengths as seen on the build plate photo. Basically they need to hang from the hanging bar so they are flush at the bottom to balance. Ha ha ha, please do better than I did making them even.