just a Bic holder , will also work with various pen and pencils

require some m4 screws to lock the pen

I was able to make simple drawings just using a flat piece of glass over the ultra base and leveling it manually

pens are not really stiff , place the holder as low as you can to reduce the flex

print it in the orientation it will be used in ( hexagonal hole on the bottom and the writings in the right position )