About this 3D model

Recently the pen holder on my drawing machine had broke. After thinking about it, I saw that it could use a redesign. I believe this pen holder will work much better for people making this machine. It uses an M3 screw to hold the pen in place. What makes this pen holder different from the original: Easier to print Stronger than original pen holder Combines two part into one (Less parts to print) Prevents the pen from bending if tightened too much