I designed a part on Fusion 360 that looks like this:
The part is very small, about 20 mm for 10 mm. I'm then importing it to Cura and I notice they are huge cracks on the part when simulating/previewing the print, I'm using a Monoprice mini printer, 100 % infill, and 0.0437 mm.:
This is my first-time 3D printing something, so maybe (most probably) I did something wrong.