Nested hollow rounded boxes

For some reason this print seems aesthetically pleasing - so I'm told.

Designed in MOI.
Made in Bilby3D PLA on an Ultimaker 1

Note that the stl file was scaled up by a factor of 2.

Without scaling up I've found it difficult to print successfully in PLA (on the Ultimaker) - I have printed without scaling up in ABS on a Robox.

Even scaled up it's a bit of a challenge. See instructions for recommendations.