Drawing Compass

Drawing compass with easy-to-use knob. Technically a remix of two designs from Thingiverse:

• https://www.thingiverse.com/thing:4288633 (scaled 102% with a larger pencil hole)
• https://www.thingiverse.com/thing:5408177 (specific settings applied)

It uses a few parts:

• 2x 14mm M4 pan head screws (https://www.mcmaster.com/92005A223/)
• 2x M4 locknuts (https://www.mcmaster.com/90631A112/)
• 1x 8mm M4 socket screw (https://www.mcmaster.com/91292A108/)
• 1x M4 nut (https://www.mcmaster.com/90591A141/) 

I tighten the two screws with locknuts just tight enough that it moves slowly when adjusting, but does not move when drawing.