Simplify sculpt brush

It’s been just about two years? since this little guy showed up (I know it’s airbrush at 0 pressure or whatever) but he still doesn’t have a nice sculpt icon, making do with a paint icon that sticks out and looks tacky in the sculpt tools palette. Is there some place we can put an icon that would be read in by Blender for this tool? In fact if we make other sculpt brushes is there some way to give them custom icons?