Testing the new design has exposed some issues I want to fix in the short term. Rather than go straight to migrating to another platform I'm going to make the following changes first.

New PCB

• Add a dual channel DAC to replace the two pots and enable automated and remote sensor calibration - the DAC is cheaper than one pot and brings more functionality.
• Improve the header arrangement to make it easier to work with.
• Use connector sockets to group wires instead of having a bunch of separate wires - will make connections more robust and easier to connect. Maybe use locking headers.

Mechanical

• Enlarge the dispense opening - a huge (finger-sized) peanut jammed yesterday and took me 30 mins to unjam remotely
• Check the pitch of the dispense baffle - I think it is too steep now and encourages jams

I also want to look into some simplification.

• Make enough internal space to use a 110mmx50mm 90° fitting instead of a 110x110mm 90° fitting with a 50mm adapter. The sliced-pipe approach to baffles also lets me create spaces within the enclosure to mount electronics. This will reduce size and remove a part from the BOM.
• Try to eliminate the baffle in the dispense pathway. It's mainly for blocking light from entering the enclosure

Previously I was focused on getting the birds to cooperate. Now that I know they will I am getting more focused on improving reliability, simplification and optimizing the BOM.