BearExxa Extruder and X Axis for Prusa i3 By Grégoire Saunier (Bear Lab) · Example build · 7 views · 0 remixes A stiffer X axis and Bondtech-geared direct-drive extruder that replaces the stock parts on a Prusa i3 MK2.5S or MK3S 0SaveRemixCopy link Estimated parts costNo price seen yetDifficultyModerateParts10 parts · 67 pcs Start the assembly guide →