Can you place a Dripstone on a hopper?

I've seen many videos about the crafter and I'm confused by how everyone I've seen says hoppers can only take out items from the grid slots, but that's not true. The thing is, the grid slots have priority, but hoppers can also take out items from the "crafted" slot. You can use an item filter to take advantage of this :D

Hopper Dropper // Understanding How it Really Works