The internet is full of wonderful Lego models, many of which can be recreated at home thanks to readily available building instructions. For a fee.

Because one of life’s few certainties is that if something can be monitized, it will be.

But not today! Previous bloggee Thirdwigg is the hero we need, having created this excellent Technic tracked excavator, complete with a linear-actuator operated arm and bucket, a working piston engine, and a slewing superstructure, and he’s released building instructions for free.

The Lego Community could do we a few more members like Thirdwigg, and you can see more of his tracked excavator on Flickr. Click here to take a look, and here for a direct link to the free instructions.