I was aware of this existing but i never really paid much attention to it being such an issue . I look at parts that have been designed , such as these that i ' m printing and i wonder why the designer never just increased the ID a little to compensate and therefor because i saw so many not doing it i assumed it wasn ' t THAT bad . Turns out it is . Thank you for the linked information . I will read in much more detail later today . So as a reference , what would you expect an ID of 19 mm to print out at on your printer ? Just so i know i ' m within reasonable limits . <| sep |> I would think that privacy laws would prevent the police from commenting on this . Perhaps the whole thing is bullshit ? <| sep |> Michiel de Ruyter !