Everything is finished. Not sure if I am allowed to put a link yet, so I'll wait on that.
HUD Customization with boss font and the health bar image.
You can toggle double HUD mode if it's available
Default image is changed:
Works for double bosses (if the toggle is enabled)
Also has support for a couple types of invincibility, which just turns the bar almost black
I also fixed how the HUD positions, so it should work better on most resolutions.