This model was created to secure the 25# gauge roller chain used on the MakerMade M2 CNC. The recommended method from MakerMade for securing the roller chain is a nail--a small gauge nail able to fit through a chain link. Needless to say that I have dang near lost my teeth on more than one occasion when the roller chain rips out of the frame when the tension is too great. No clue if this will float your boat, but I feel somewhat confident that it will work better than a nail that I would use hang up a 5x7 framed picture of my uncle.

I keep the print fairly straightforward on the Elegoo CC and used PLA+ on the 020mm Strength setting with a 0.4 nozzle. 

I recommend using tree supports for the interior overhang and only from the build plate, as this keeps the slicer from supporting ever little hole that doesn't need support.