Ripple Phone Holder [Vase Mode/Spiralized Outer Contour] with dual layer trick

For everyone like me who's new to working from home, this is great for keeping my phone nearby, visible, and taking up a minimal footprint on my tiny workspace.

I'm quite proud of this design. I'm leveraging the fast print speed of vase mode / spiralized outer contour along with the stiffness of 2 interacting surfaces to make a light weight (~13g) yet strong and fast printed object of good size.

There are two tricks in this design:
(1) There's a 0.1mm gap at the bottom of the phone holder. This gap is large enough for the slicer to see it as a gap but small enough that the two parts still fuse together. Thus, the 0.1mm gap allows for an 'inner' layer to the spiralized outer contour.
(2) The gap between the 'inner' and outer layers narrows down to 0.5mm at the bottom of the ripples allowing the outer layer to fuze with the 'inner' one.

The radial corrugation created results in a very stiff structure without the use of much material!

Print instructions

The smallest 0.5mm gap between the inner and outer surfaces is designed for a 0.4mm nozzle. This ensures that the inner and outer surface spirals fuse together for a structural connection.