Diesel Tool System.ArgumentOutOfRangeException...

For some reason, when I try to export the com_prop_jewelry_tiara.model or the com_prop_jewelry_display_jewel_2_b.model, i get this stupid error...
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Does anybody know how to fix it or avoid it?
Oh man that sucks.
Also one more thing, is it possible to assign another model or create another one for that particular thing or will that mess up the game? I'm pretty sure I've seen EvilBob implement a new model entirely but I'm not sure if I can assign an existing unit with it.