The standard knobs for the propeller and mixture levers on the CH Flight Sim Yoke are gray, which is just boring! These replicas allow you to print them yourself in the right colors - which is generally blue for propeller RPM and red for the mixture.

The tolerances are set so they fit fairly good on the levers (you can just pull the existing ones off) - if you have a printer that is capable of 0.2mm tolerances. If it is too loose, you can also use some tape around the lever to increase its effective size.

Otherwise, you can modify the user parameters in the Fusion 360 file.

Slicing settings

2 walls

20% gyroid infill