Need Help Making a custom Trident-Like Item with durability

I have been having difficulty making an axe that can be thrown like a trident. I have followed NorthWestTreesGaming's tutorials (both V1 and V2) and my only problem is that I want to change the axe's durability each time it is used. Any recommendations?

Right now I have the projectile use itself as ammo, it has a custom model and UV map and spawn the same item when it hits a block or entity. Ideally it can behave near identically to the trident, loyalty and al, but right now I'll take what I can get.