Besides each assembly section, the CAD of the Sandbox can be used as a guide for assembling the Sandbox.
- FreeCAD file: ./cad/freecad/tectoh.FCStd
FreeCAD is Open Source Software that can be downloaded at no cost: https://www.freecadweb.org/
There are some parts that need to be 3D printed, so you will need a 3D printer and some PLA filament.
Parts to 3D print and CAD of the system:
The optional parts are not required, but the are useful to check that the device is moving as expected.