If you made the height and position settings on your parts in FreeCAD, you can export the three parts already setup with the correct dimensions and offsets as three separate files.
Select all three parts in your file system and drag them to an empty Bambu Studio.
As it sees multiple files (this is the key) it will ask you if you want them all to be the same part, say YES.
All you dimensions and more importantly, your offsets for height in this case are identical to your design.
You only need to select them in the object view and choose a colour.
- It’s faster
- Your source CAD has all the correct values
- You don’t have to remember to get it correct in the slicer
- No need for primitives in the mix
- No need to deal with BS centre based z-value