Replace opacity option for fill tool (and all tools)

Features
1

I think there should be a “replace opacity” option for all tools.
When off, it functions like it does now.
When turned on, using the fill tool would replace the color, including opacity, rather than filling over top of it.

2

You can try the Copy Alpha+Color and Lock Alpha inks for the tools and see if that does what you want.

If you have an area of color that is at lets say 50% opacity, and you fill it with a 20% opacity color, then Simple Ink will mix them together, Copy Alpha will overwrite it and turn the area into a 20% opacity area, and Lock Alpha will keep it at 50%.
image

3

I see, looks like that does what I’m looking for. Thanks.