Anycubic i3 mega extruder side mount reinforced

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2544902.

My print of the original side extruder mount cracked while I attached the bowden tube. The force induced by the spanner was too high for the structure, so it cracked at the first angle from the top. That's why I added the reinforcement ridges.