I printed it with a 0.8mm nozzle, but if you use 0.4mm should work perfect also. With my setup the two parts print in about 38 minutes.

You need a 1/4-20 flat head screw (1/2" long), a wingnut and a pushpin. It should work with a mechanical pencil or regular pencil.

I got this idea from a John Heisz video. Link below https://www.youtube.com/watch?v=xGahy4nMsys