About carrying objects. Sometimes, there will be places, for example, where you need to collect 3 swords to open a door. But usually, to complete part of the level you need to collect different types of treasures, 1 item each, or just 1 treasure. So, I'm more in favor of the player being able to carry several of the same items. But at the same time, so that the situation where you need to collect different items is not disrupted.
About the names of the items. I agree that there needs to be a more specific name for the item. Unfortunately, I do not have information about a more precise name for the item. You can settle on what they will be called, for example, an Ancient Greek Sword and so on. This way there should be no conflict between other swords (if there are any) and the rest of the items.
In total, 2 types of helmets were conceived. I see that the problem is with the first type. One person helped me create a single model (from one part) and I am ready to give it to you so that the item works correctly. This model has its own rotation animation. I hope this won't be too much trouble. If anything, you can do regular animation for it like other items, if possible.
https://drive.google.com/file/d/1eABe1QI_GVo2J2NjDpnxLejJ5sAAgfBK/view?usp=shari...