Use supports as needed, overhang capabilities vary between printers.
Threads are rounded to have an easier time threading on and off however, you may still need to work them to get threads on if your printer is not perfectly accurate.
German: Vielen Dank für den Ausdruck. Ich werde bald eine lockerere Version hinzufügen. Es tut mir leid für die Unannehmlichkeiten.
English: Thank you for printing. I am going to add a looser version soon. I apologize for any inconvenience.