The open source Prusa Steel was originally designed as a remix of Twelvepro's redesign of Josef Prusa's i3. It was first presented as a prototype named Leonardo by Irobri in April 2013 after having attended a Maker show in Zaragoza, Spain. Made from 3mm laser cut steel for added durability, the Prusa Steel has several advantages over the standard (non-steel) Prusa i3. In addition to a simple assembly design that eliminates the need for unnecessary parts, the use of structural steel reduces the price of fabrication by up to ten times when compared to aluminium. Additionally, since steel is significantly heavier than aluminium, the heavier frame of the printer prevents unpredictable vibrations that can compromise the final quality of 3D prints. While experienced Makers tout the Prusa Steel as a very reliable 3D printer for their needs, other users are quick to add that it's a perfect 3D printer for those looking to learn and grow in the field of 3D printing.