Meant for the same print settings that https://www.printables.com/@AdamL - suggested: 

• 2 100% infill modifiers over the two corners (see picture).
• 40% gyroid infill, 5 perimeters

Included the MK4 Input slicer PETG print file that produced the item in the pictures.

As with the original model no gurantees given. Works for me, haven't battle tested it yet though.