Custom Icons for Mushroom Cards?

Good afternoon

I am currently looking at designing a dashboard to be used on an eink touch panel - would I be better served forking this project and replacing the included icons with crisp black and white high contrast versions, or is there a way to change them manually in the visual editor? Ideally being able to point the cards to see a different library would be easiest, but I am happy to at least initially swap them out one by one as I design the initial layout config