You can download 2 versions, one with an additional thread tolerance of 0.1 and one with 0.2 mm. I printed both versions, in PLA, with a layer of 0.1 height.
I decided to keep the 0.1 without any mechanical adjustments.
The 0.2 tolerance might be a better fit if you decide to print in 0.2 layer height and PETG (I expect more friction). In both versions you will find a small play between parts when holding in your hands, but this is canceled when installing on the printer due to the weight.
The cap is not mandatory to print for the functionality of the assembly, it's purpose is only to hold the original rubber feet into place, to not fall when moving the printer.
The author remixed this model.
1. Modified thread increasing tollerance/ clearance for smooth operation
2. Rounded the edges of the thread for longer lasting
3. Changed surface type for the knob (smoother)
4. Increased diameter of the threaded axes to increase vibration resistance
5. Modified the cross on the bottom cap (that holds the original feet). For me it broke when forced. Replaced it with a hexagonal hole so that I can use a tool. Tool is not mandatory as you can tighten the cap in place by squeezing the original rubber feet from the side, then turn.