+The Bounding Box mesh is only used to determine the scale and height of the model, be careful to surpass the box, sometimes the results are ugly. (This object is restricted, cannot be selected in the viewport, used to avoid exportation phase).
When the model is exported to MD3, you would need to modify the groups, ring[1-6](all rings) should be renamed to "ring" (without numbers), the skin files need to detect this group name.
Also, possibly, you would need to modify the materials to make it work, rename the following ones: relic_ring.tga, ring.tga
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