your profile is set up for a .6mm nozzle, any chance you could do one for a .4mm and upload it. As I'm not sure how you made that cylinder and operations to make your end result. I usually just model stuff directly.
Its actually build in Bambustudio, its a cylinder with two negative cylinders inside, combined with 0 infill, 0 top and bottom Layers you will get this end result. I tested a lot and found out 4 walls 0.6 or 5 walls 0.4 gets you the optimal stability.