When a point is rotated more than 90 degrees on two axes in local space, one of the axes is lost. This issue is difficult to understand without examples, so here are some.
With SetOrientation()
// offset is vector in angles armorPiece.SetOrientation(offset + "0 90 90");
This should logically rotate the object with an offset of +90 degrees on both the Y and Z axes.
Tests with different offsets:
offset = "0 0 0"
offset = "90 0 0"
offset = "0 90 0"
offset = "0 0 90"
As you can see, the X axis is completely lost.
InventorySlotsOffsets Issue
This issue is easiest to replicate using InventorySlotsOffsets.
Here, I add the InventorySlotsOffsets for the Belt_Right slot to the holster:
"0 90 90"
"90 90 90"
"0 180 90"
"0 90 180"
