There is a huge potential missing here. Some of these item models could also be used as attachments. As they are, they are not suited for that purpose. Look at
Primitive Ward for a way to incorporate the means to be both an item model and an attachment. An animation called "Second" is used. Or perhaps have two different models for each purpose. Two models may prove to be less restrained to use for the end user than an animation.
Of course, this may not have been your intention when creating these models. Yet, these models can be so much more. I sigh at the loss.