Free X-axis upgrade with linear rail, belt tensioner and bearing clamping - Prusa MK3 / MK3s / MK3s+ Printables · MW
Free Prusa MK3 / MK3S / MK3S+ X-Axis Linear Rail Guide Upgrade - updated (Bondtech Extruder) / MK3S+ Tensioner Printables · KalleKnall
Free MK3S+ LGX Shortcut Compatible X-Axis Upgrade with Tensioner (Bear-Derived) Printables · Step by Stepp Designs