Make a huge circle with a 10x10mm aluminum square tube on your prevered length and two printable parts.

This circle has a 3 point stand (pin, pencil and a printed pyramid). So he can stand securely and you can draw a circle very clean/easily.

Tool and distance change is very fast with knurled screws.

You must add:

• 10x10 aluminum square tube
• 1mm needle / pin (or bigger if you can drill the hole)
• knurled screw 4mm
• knurled screw 6mm
• pincel or something