UPDATE 18DEC13: Tried printing the arm but the end part did not print so well. Another quick mod in Sketchup and it should print better/easier now. UPDATE 17DEC13: Okay, so originally I was just hoping to just offer a quick .stl with my simple conversion method from .Thing to .stl mentioned in the source Thing comment. I went to print this model out and there was support everywhere (for the arm). Decided to import the .stl file into Sketchup and see what was up...noticed a couple issues and remodeled the arm completely. Just ran it through Netfabb too, should print better/easier now. Apologies for not matching the curve of the arm tip exactly. Thanks UPDATE 13FEB15:Added new counterweight bucket file and pivot spacer. Thanks to the comment by jflemieux I was able to understand a bit more what was wrong with the original set of files (not created by me) and instead of needing to create the files from scratch, I can repair or model around the imported files. Thanks again mate! Just added the "fixed" base. It was run through Netfabb too