MakeSmith CNC Sharpie Adapter

This Is a work in progress.
I was ask to make an adapter that works with the existing mount that would allow a person to mount sharpies and other not spindle items.
this adapter should slide right into parts B10, B11, F2, and F3.
I have tried to include a diagram to display how it should work.
It may be necessary to wrap a little tape around your sharpie if you are using one thinner than i based the model off of.
You will need to print this part four times.
I was thinking that this might also work with an xacto knife if you mounted it in a thrust bearing. we will see.