Hey! Loving the mod so far, but I did notice one issue. When the player does the animation for the Thousand-Metal Axe, all items equipped in the player's Curios inventory (so long as they have models) will vanish until the animation is complete. This is hard to see with some mods, but you can use the Sophisticated Backpacks mod if you want to see it in action, as it's pretty obvious. Make sure it's equipped in the Back curios slot rather than the chest armor slot, though, as it seems to work fine while it's in the chest slot.
[Other possibilities: the chest armor may be overriding where the backpack renders during the axe animation, and it might work fine if chest armor is absent?]

Well, to render the animation, I have to completely replace the player renderer with a custom one while the animation is playing. This custom renderer does not have any layers or additions from the Curios API. Unfortunately, there is nothing I can do about this…