Included is the two side mounts for the bed and the rear mount that incorporate wobble x. You will have to source 3 ws8 wobble x's or 3d printer your own and use 3mm x 8mm loose roller needle rods (66 HRC) and 4mm ball bearings, or you can substitute the loose roller needle bearings with softer stainless steel 3mm x 8mm dowel pins. They might wear out eventually since it will be contacting the harder 66HRC 4mm bearing, but they are easier to source than loose needle rollers.
The author remixed this model.
I decided to add wobble x to my ender 3 ng as the leadscrews I had were waaaay out of spec and thus the integrated z wobble system was unable to adequately compensate.