An open source 3D printer has different designs, and some are simple. This normally require fewer materials than most of other 3D printers. It has a frame that can be made from a single 4’ long or longer, and about a 2 and an half square tube, then 14 guage/1.5mm/about .0598, and it is very cheap. This is a design that has fewer plastic parts, and still build a structure that is stronger. It has wires, but they are all hidden. Some people finds the finishing of a unit to be more appealing, after it is finished.