I got tired of the cheap Chinese pencils that break within a week and I got fed up and started my own design so I could be able to use the lead from the broken pencils and have a pencil that could last a long time and I have currently made 3 and all work pretty well

wanhao duplicator i3 v2

Yes

Doesn't Matter

.2 mm layer height

100% to 90%

you can take the model in tinker cad and design a new middle moving piece to hold thicker lead