Paper Towel Roll Holder for IKEA BEKVÄM spice rack

I am super clumsy and I keep ruining rolls when they are on the counter, I already had a spice rack from IKEA and I figured it would be very space effective to have the roll right beside that. I came up with this design -my first ever, yay!- to do just that. 

It's easy to print but the tower came out with some helix artifacts. I'm not sure why that happened, but it doesn't look all that bad.   

The attached FreeCAD project is just as messy as I am :)