Open Hardware Knob (no sharp corners or edges)

What would fit better to the door for the cabinet that houses my prusas than an open hardware doorknob? 

Super sturdy, easy to grab, and pleasing to the eye (more or less, form follows function)
You will need M4 nut and screw (maybe a washer too). Just slide the nut into the slot, and you can fit it to the door with the screw. 

Or print two of them and add the latch to secure your precious print(er)s from nosy kids or pets. To maske it easier to adjust the needed length of the latch for your specific doors, I added the blender file.