The RepRap motto is "wealth without money" - for this assignment you are to create wealth by making an open source design that has value to you. It must be 3D printable on your MOST Delta and cost less than a commercial equivalent (if such a thing exists).
Design 3D printable components with ONLY OS CAD packages (e.g. Blender or OpenSCAD or FreeCAD)
Upload your design under an OS license to https://www.myminifactory.com/ - include: Source files, STLs, a picture, and a brief description including costs and $ savings.
Add picture, link to your MyMiniFactory page with name, commercial equivalent link+cost, and economic savings to table below (see example).