These corner joints consist of 3 of the same component, stapled together.

The name comes from another of my hobbies, BJJ, in which there is a Gorilla Grib. You anchor your hand in such a way that the fingers do not cross, but lie parallel to each other and enclose the other hand.

In the model, the fingers are the layers in the 3D print and are anchored orthogonally in all 3 axes.