Thomas Sanladerer, who is known to some as "YouTube's 3D printing guru," gives detailed video instructions about how to convert a LulzBot Mini into accepting 1.75 mm filament. The process is fairly straightforward and well-explained by Sanladerer, and the comments on the video raise interesting insights about why 3D printers use different sizes for filament and the relative merits of each. Learn more at http://3dprint.com/106974/convert-lu...mini-filament/