Designed for the PARKSIDE® PHLGD 2000 B4 heat gun. But I believe it will work for other models as well.
Recommended settings
Material: PET-G
Layer height: 0.2
Perimeters: 4 or more
Infill: 20%
Infill Type: Cubic (or something similarly strong)
Supports: Yes, for the hexagon in the middle
Note: Because of the weight of the tool, I made hexagons with a really tight fit. So once you put it in an empty insert, it probably won't come off without damage.