u/AiB_aK1llP2

I'm trying to find a design of cart unloader, specifically for a chest minecart. Every design I have looked at so far has too many edge cases that would make a cart based item distribution system unreliable. I need the unloader to hold the cart with detection for -
- If the cart is empty, cart is released
- If the storage the cart is delivering to is full, cart is released
- If the storage the cart is delivering to still needs re-filling, cart is called.

I have created a design that does the later 2 requirements but can't figure out how to detect if the cart is empty with the same system.

I would also appreciate any ideas for making the design more compact.