Need to sell this one to make some space. Lightly used CR-10S Pro with added dual Z sync belt (leadscrews and X gantry will always stay in perfect alignment), all fans inside the case have been upgraded with noctua silent fans so the printer is extremely silent, Z frame braces made from 20x20x600 aluminum extrusions and completely solid 3D printed pieces, upgraded custom firmware to the latest version of marlin and including thermal runaway protection, screen beeps and startup noises have been silenced, heavy aluminum bed has been replaced with a flex steel sheet with PEI on top for very easy print removal, buggy auto leveling sensor has been replaced with a physical endstop and the bed is flat so leveling is very easy just using the screws on the bed, hotend cage with one sided cooling replaced with a dual fang 5015 blower setup, bed wheels have been replaced with solid polycarbonate wheels and the wheels on the X and Z are all new. Any questions feel free to ask, I have been 3D printing on a dozen machines for over three years now so I can answer anything you like and help you to get started if you need. Included are the spool holder, spare nozzles, and the included unused tool kit.