I'd love to see pictures of your prints!

The tolerances on this backhoe are such that if you want the parts to move you need to print it with a small nozzle at 1 mm layer height, or scale up the model.

This model should fit right in with agepbiz's Tiny Wheels collection.

UPDATE: Per request, I have added a backhoe model with tighter tolerances. It is untested, but will probably work better if you intend to upscale.