This collection of parts was made to help organize an electronics test area by assembling test benches out of dowels. Additional accessories already provided in this set include a base for a Texas Instruments launchpad, and a low cost precision digital power supply. Note that the other files are dependent on TkrTestbench.scad Supplied files are OpenScad source files. This is a major update. The general model has not changed but all source files have changed and some have been added. When I started trying to do the instructions, I realized that I really hadn't thought this through. I also recognized that I had not adopted clear conventions, so I started anew, addressing naming, documentation, structure, and conventions. I also learned how to use Doxygen effectively with openscad and have generated pretty good documentation. One of the conventions is that each library now has a contents module intended to show the contents of the file, and that module is active by default, so you can double click on any file and you will get the contents shown the the images here. For complete documentation, look here https://yourdevelopmentteam.com/things/TinkertoyTestbench/, or unzip TinkertoyTestbenchDoc..zip and open TinkertoyTestbench.chm. If there are problems, see the included readme.All source files are OpenScad. Open example.scad in OpenScad. It contains a kit module as an example as well as commented out calls to most of the parts. The only premade .stl provided is a rendering of that kit. For complete documentation, look here https://yourdevelopmentteam.com/things/TinkertoyTestbench/, or unzip TinkertoyTestbenchDoc..zip and open TinkertoyTestbench.chm. If there are problems, see the included readme.