This is a remix https://www.printables.com/model/73347-festool-ro150-holder
The handles I found felt too weak to hold the Rotex 150. So I made my own based on the model from the Kerndrup project. The holder fits ETS 150, ETS EC 150, Rotex 150.
0.25mm layer height
supports yes
20% infill
5-6 perimeters
filament PETG
The author remixed this model.