About this 3D model

Designed to be almost fully 3d printable (except for horizontal rods). It is easily printed without supports. A 72mm x 2mm length of metal needs to be used for the axis of the wheel. For this, I cut a piece of clothes-hanger. This allows for the Wheel Frame, thus Wheel, to spin freely with very little friction :) (It is the Wheel Frame that spins on the axis. The metal rod simply press fits into the main support(s). I designed this to be as simple as possible and seems to assemble well and spin well with silence. 0.2mm tolerances are built into the design, so this can be easily assembled regardless of print quality. Hope this helps your little fluffy friends.Happy printing.Thanks for viewing :)